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4x - y = -16-------x1----> 4x - y = -16
----------------------------------------------------- -
>>>>>>>>>>>>>>>> -5y = -20
>>>>>>>>>>>>>>>> y=4
4x - y = -16
4x - 4 = -16
4x = -12
x = -3
5x + 2y
=5(-3) + 2(4)
=-15 + 8
= -7