Saya minta yang no 13 ya

-2x + 2y = -2 <----- 2y = 2x - 2
-2x - 3y = -3
------------------ +
0x - 1y = -5
-y = -5
y = 5

Maka,
2(10) = 2x - 2
20 + 2 = 2x
22 = 2x
x = 22/2
x = 11

Semoga membantu...