2a + b = -3 dan -3a + b= 7

2a+b=-3
-3a+b=7
------------- -
5a = -10
a = -10/5
a = -2
semoga membantu

Eliminasi

2a + b = -3
-3a + b = 7
----------------- (-)
5a = 10
a = 10/5
a = 2

2a + b = -3
2(2) + b = -3
4 + b = -3
b = -3 -4
b = -7



HP = {2 dan -7}

#semoga membantu