Question

x+y:4
3x+2y:9

3x+y:16
2x+y:12

x-y:5
x+3y:9

3x-2y:6
x-3y:2

Answer 1

x +y = 4(-2)
3x +2y = 9

-2x -2y = -4
3x +2y = 9

x = 5

3 . 5 +2y = 9
15 +2y = 9
2y = 9 -15
2y = -6
y = -6/2
y - -3
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3x +y = 16
2x +y = 12(-1)

3x +y = 16
-2x -y = -12

x = 4

2 . 4 +y = 12
8 +y = 12
y = 12 -8
y = 4
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x -y = 5(-1)
x +3y = 9

-x +y = -5
x +3y = 9

4y = 4
y = 4/4
y = 1

x -1 = 5
x = 5 +1
x = 6
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3x -2y = 6
x -3y = 2(-3)

3x -2y = 6
-3x +9y = -6

7y = 0
y = 7

x -3 . 7 = 2
x -21 = 2
x = 21 +2
x = 23

Answer 2

X+y:4
3x+2y:9
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3x+y:16           3x + y = 16      y = 16 - 3x = y = 16-3(4) =. y = 16 - 12 => y = 4
2x+y:12(-1)      -2x - y  = - 12                  
                              x = 4
=========================================================
x-y:5(-1)        - x + y = - 5
x+3y:9             x + 3y = 9
                           4y = 4 ==>y = 1

x = 5 + y ==> x = 5 + 1 ==> x = 6
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3x-2y:6
x-3y:2(-3)


 3x - 2y = 6
-3x + 9y = - 6
 7y = 0 ==> y = 0

x = 2 + 3y ==. x = 2 + 3(0) ==> x = 2+0 ==. x = 2