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Solve the following word problem (Hint: setup and solve a system of equations):
One number plus twice another number gives a sum of 42. The difference of these same two numbers equals –3.
Find the two numbers
(Points : 5)
The numbers are 12 and 15.
The numbers are 11 and 14.
The numbers are 13 and 16.
This problem has no solution.
**Weegy:** x+2y=42 and x-y=3. Solving by subtracting the two equations, we get
3y=39,y=13. as x cancels each other. Assuming from the options, your answer is y=13 and x=16 (More)

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Updated 11/22/2012 9:09:07 PM

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The answer is "The numbers are 12 and 15"

Added 11/21/2012 3:53:58 AM

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12&15

Added 11/21/2012 4:01:22 AM

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let:

x= 1st number

y = 2nd number

Equations formed:

x + 2y = 42

x - y = -3

Solve for y through subtracting the two equations:

x+2y-x+y=42+3

x-x+2y+y=42+3

3y=45

y =45/3

y=15

Solve for x by substituting y in any of the formed equations:

x-15=-3

x=-3+15

x=12

The two numbers are 12 and 15.

x= 1st number

y = 2nd number

Equations formed:

x + 2y = 42

x - y = -3

Solve for y through subtracting the two equations:

x+2y-x+y=42+3

x-x+2y+y=42+3

3y=45

y =45/3

y=15

Solve for x by substituting y in any of the formed equations:

x-15=-3

x=-3+15

x=12

The two numbers are 12 and 15.

Added 11/22/2012 9:04:20 PM

bongche and thusiskinny : In correcting worded problems, kindly provide a solution to support your answers.

Added 11/22/2012 9:05:40 PM

thusiskinny: Please refrain from posting duplicate answers. Your answer will be considered if you have provided a solution.

Please review Weegy's basic rules

Please review Weegy's basic rules

Added 11/22/2012 9:09:07 PM

If the system of equations given below is solved using the substitution method, what is the equation that results from solving the second equation for y, and substituting into the first equation?
3x - 2y = 7
x - y = 5
(Points : 5)
y + 15 = 7
x + 10 = 7
y = x - 5
x - 10 = 7
**Weegy:** (3x-2) squared is 9x^2 - 12x + 4. (More)

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Expert Answered

Updated 12/1/2012 8:12:51 PM

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The answer to your question , the equation that results from solving the second equation for y, and substituting into the first equation is 3x - 2y = 7 ; x - y = 5

Added 12/1/2012 8:12:52 PM

If the system of equations given below is solved using the substitution method, what is the equation that results from solving the second equation for y, and substituting into the first equation?
3x - 2y = 7
x - y = 5
(Points : 5)
a. y + 15 = 7
b. x + 10 = 7
c. y = x - 5
d. x - 10 = 7

Question

Not Answered

Updated 9/20/2014 7:54:11 AM

1 Answer/Comment

x + 10 = 7 is the equation that results from solving the second equation for y, and substituting into the first equation .

x - y = 5

y = x - 5

Put y = x -5 in the first equation ,we can get the following steps :

3x - 2y = 7

3x - 2 (x - 5) = 7

3x -2x +10 = 7

x +10 =7

x - y = 5

y = x - 5

Put y = x -5 in the first equation ,we can get the following steps :

3x - 2y = 7

3x - 2 (x - 5) = 7

3x -2x +10 = 7

x +10 =7

Added 9/20/2014 7:54:11 AM

Given the function f(x) = - 2x , find the value of f(–1). (Points : 5)
a. f(-1) = -3
b. f(-1) = 2
c. f(-1) = -2
d. f(-1) = 0
**Weegy:** f(x) = - 2x, f(–1),
f(–1) = -2(-1)
f(–1) = 2 (More)

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Updated 1/30/2016 10:43:01 AM

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