Tolong di jawab plissz

a. 2x-y= -1 | ×2|
3x+2y= 16 | ×1|
Menjadi
4x-2y = -2
3x+2y = 16
_________ +
7x= 14
x = 14/7 = 2
Substitusikan:
2x-y=-1
2(2)-y = -1
4-y= -1
-y= -1-4
-y=-5
y=5