Solve the following system of equations by the substitution method. 8x = 2y + 5 3x = y + 7
Question
Updated 11/26/2014 2:15:30 AM
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Flagged by janezeshun [11/26/2014 2:12:40 AM]
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Original conversation
User: Solve the following system of equations by the substitution method. 8x = 2y + 5 3x = y + 7

Weegy: The solution set of the equation 8x = 2y + 5 3x = y + 7 is {(-9/2, -41/2)}.
emdjay23|Points 18164|

User: Which of the following equations could be the result of using the comparison method to solve the system shown? x - 4y - 1 = 0 x + 5y - 4 = 0 4y + 1 = 4 - 5y. -4y + 1 = 4 - 5y. 4y + 1 = 5y - 4.

User: Solve the following system of equations. 2x + y = 3 x = 2y - 1

User: Which of the following equations could be the result of using the comparison method to solve the system shown? x + y = 5 2x + y = 7 -x - 5 = 7 - 2x. 5 - x = 7 - 2x. 5 - x = 2x - 7.

Weegy: |2x - 5| = 4;

-(2x - 5) = 4; -2x + 5 = 4; -2x = 4 - 5; -2x = -1; x = 1/2
- - -
(2x - 5) = 4; 2x = 4 + 5; 2x = 9; x = 9/2,

x = 1/2 or x = 9/2

User: For the following system, use the second equation to make a substitution for x in the first equation. x + 5y - 10 = 0 x = 2y - 8

Question
Updated 11/26/2014 2:15:30 AM
This conversation has been flagged as incorrect.
Flagged by janezeshun [11/26/2014 2:12:40 AM]
Rating
5
5 - x = 7 - 2x could be the result of using the comparison method to solve the system shown: x + y = 5 , 2x + y = 7 .
Equation 1 : x + y = 5 , so y = 5 - x
Equation 2 : 2x + y = 7 , so y = 7 - 2x
And 5 - x = 7 - 2x
Confirmed by jeifunk [11/26/2014 2:30:01 AM]
5
For the following system, use the second equation to make a substitution for x in the first equation : x + 5y - 10 = 0 , x = 2y - 8 , we get 7y - 18 = 0 , so the solutions is x = -20/7 , y = 18/7 .
x + 5y - 10 = 0
2y - 8 + 5y - 10 = 0
7y - 18 = 0
y = 18/7
x = 2*18/7 - 8
x = 36/7 - 56/7
x = - 20/7

Questions asked by the same visitor
3x + 1 User: Factor 25x 2 + 10x + 1.
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Question
Updated 11/21/2014 7:07:16 PM
3x + 1 < 7
3x < 7 - 1
3x < 6
x < 6/3
x < 2 .
Confirmed by andrewpallarca [11/22/2014 1:03:25 AM], Rated good by andrewpallarca
x - 7 > -2
x > -2 + 7
x > 5
Confirmed by andrewpallarca [11/22/2014 1:03:45 AM], Rated good by andrewpallarca
7x + 1 < 4(x - 2)
7x + 1 < 4x - 8
7x - 4x < -8 - 1
3x < -9
x < -3
Confirmed by andrewpallarca [11/22/2014 1:04:20 AM], Rated good by andrewpallarca
y(y + 4) - y = 6 is a quadratic equation is true.
y(y + 4) - y = 6
y^2 + 4y - y = 6
y^2 + 3y = 6
Confirmed by andrewpallarca [11/22/2014 1:04:52 AM], Rated good by andrewpallarca
x + y = k x - y = k
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Question
Updated 11/26/2014 1:28:16 AM
The solution for x + y = k , x - y = k is x = k , y= 0 .
Equation 1 add equaiton 2 ,
x + y + x - y = k + k ,
2x = 2k ,
x = k ,
k + y = k ,
y = k - k ,
y = 0 .

Confirmed by sujaysen [11/26/2014 8:13:49 AM]
The solution for 5x + y = 6 , 5x + 3y = -4 is x = 11/5 , y = -5 .
Equation 1 minus equation 2 ,
5x + y - 5x - 3y = 6 - (-4) ,
-2y = 10 ,
y = -5 ,
5x - 5 = 6 ,
5x = 6 + 5 ,
x = 11/5 .

Confirmed by sujaysen [11/26/2014 8:15:04 AM]
3x - 4y = 7 , 3x + 2y = -5 When the second equation is subtracted from the first, the resulting equation is -6y = 12 .
3x - 4y - (3x + 2y) = 7 - (-5) ,
3x - 4y - 3x - 2y = 12 ,
-6y = 12 .
Confirmed by sujaysen [11/26/2014 8:18:25 AM]
7x - 3y = 4 2x - 4y = 1 The solution to the system of equations is _____. User: 2x + y = -2 x + y = 5 The x-coordinate of the solution to the system shown is ___.
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Question
Updated 11/26/2014 2:08:19 AM
x - y = 4 , x + y = 8 The x-coordinate of the solution to the system shown is 6.
x - y + x + y = 4 + 8
2x = 12
x = 12/2
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Confirmed by jeifunk [11/26/2014 2:37:31 AM]
Solve 3(x - 2)
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Question
Updated 11/18/2014 8:29:09 PM
3(x + 2) > x
3x + 6 > x
3x - x > -6
2x > -6
x > -3
Confirmed by yumdrea [11/18/2014 8:42:04 PM]
The true statement about the graph of x < 4 is: open circle on 4 and all numbers to the left shaded
Solve the following system of equations. 3x + 2y - 5 = 0 x = y + 10
Weegy: 3x + 2y - 5 = 0 x = y + 10 substitute x in the first equation: 3(y + 10) + 2y - 5 = 0 3y + 30 + 2y - 5 = 0 5y + 25 = 0 y = -5 x = -5 + 10 = 5 The solution for the system 3x + 2y - 5 = 0 x = y + 10 is (5, -5) (More)
Question
Updated 11/25/2014 12:41:59 PM
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