Solve 3x + 2y = 2 and 2x + y = 6?
3x + 2y = 2 ; 2x + y = 6 ; y = -2x + 6 ; 3x + 2(-2x + 6) = 2 ; 3x - 4x + 12 = 2 ; -x + 12 = 2 ; -x = 2 - 12 ; -x = -10 ; x = 10 ; 3(10) + 2y = 2 ; 30 + 2y = 2 ; 2y = 2 - 30 ; 2y = -28 ; y = -28/2 ; y = -14 ; Solution set: (10, -14)
Question
Updated 3/29/2018 7:30:30 AM
Edited by Masamune [3/29/2018 7:30:29 AM]
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3x + 2y = 2 ;
2x + y = 6 ;
y = -2x + 6 ;

3x + 2(-2x + 6) = 2 ;
3x - 4x + 12 = 2 ;
-x + 12 = 2 ;
-x = 2 - 12 ;
-x = -10 ;
x = 10 ;

3(10) + 2y = 2 ;
30 + 2y = 2 ;
2y = 2 - 30 ;
2y = -28 ;
y = -28/2 ;
y = -14 ;

Solution set: (10, -14)

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