tolong pakai caranya

jawab

A)
2a = 46
a = 23

3b = 39
b = 13


B)
2x = x + 32
x = 32
2x + 4y = 180
2(32) + 4y = 180
64 + 4y = 180
4y = 180-64 = 116
y = 29

2x + 12 z = 180
2(32) + 12 x = 180
64 + 12 z = 180
12z = 180-64 =116
z = 116/12
z = 9,67