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Substitution method y = 2x - 6 5x + 2y = -3
y = 2x - 6 ; 5x + 2y = -3; 5x + 2(2x - 6) = -3 ; 5x + 4x - 12 = -3 ; 9x - 12 = -3 ; 9x = -3 + 12 ; 9x = 9 ; x = 9/9 ; x = 1 ; y = 2(1) - 6 ; y = 2 - 6 ; y = -4; Solution set: (1, -4)
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Asked 8/26/2013 12:14:40 AM
Updated 186 days ago|1/12/2018 12:59:54 AM
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This answer has been confirmed as correct and helpful.
Edited by Masamune [1/12/2018 12:59:52 AM], Confirmed by Masamune [1/12/2018 12:59:54 AM]
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Questions asked by the same visitor
Use substitution to solve the system y=2x-6 5x+2y=-3
Question
Expert Answered
Updated 11/16/2014 4:05:37 PM
1 Answer/Comment
The solution set for y = 2x - 6, 5x + 2y = -3 is {x = 1, y = -4}

5x + 2(2x - 6) = -3;
5x + 4x - 12= -3;
9x = -3 + 12;
9x = 9;
x = 9/9 = 1;

y = 2x - 6;
y = 2 - 6;
y = -4
Added 11/16/2014 4:05:37 PM
This answer has been confirmed as correct and helpful.
the sum of two numbers is 60 and the difference is 10 what are the numbers.
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Not Answered
Updated 5/14/2014 9:02:34 PM
1 Answer/Comment
Let x and y be the two numbers, we were given:
x + y = 60
x - y = 10
adding up the above equations the result is:
2x = 70
x = 35;
35 + y = 60
y = 60 - 35 = 25
the sum of two numbers is 60 and the difference is 10, the numbers are 35 and 25.
Added 5/14/2014 9:02:34 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [5/14/2014 9:03:02 PM]
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