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-5x+y=-27(×-3)
>> 2x-3y=16
15x-3y= 81
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-13x= - 65
x= 5
2x-3y=16
2(5)-3y=16
10-3y=16
-3y=16-10
-3y= 6
y = -2
-5x + y = -27 |x2 |
10x - 15y = 80
-10x + 2y = -54 +
-13y = 26
y =
y = -2