Tolong dijawab. Besok mau dikumpul

a) x + 3y = 5
x + y = 13
__________ _
2y = -8
y = -4
x + y = 13
x + (-4) = 13
x = 13 + 4 = 17

b) 2x + y = 1. | x1
x - 5y = -27 | x2
______________
2x + y = 1
2x - 10y = -54
______________ _
- 11y = -55
y = 55/11
y = 5
2x + y = 1
2x + 5 = 1
2x =1-5
x = -4/2 = -2

c) x + 2y = 5
x - 3y = -10
__________ _
-5y = -15
y = 15/5 =3
x + 2y = 5
x + 2(3) = 5
x = 5-6 = -1

d) 3x + y = 11
x - y = -3
__________ +
4x = 8
x = 8/4 =2
x - y = -3
2 - y = -3
2 + 3 = y
5 = y

(maaf ini yang lengkap)