Resposta :
a) 2x = -8
x = -8/2
x = -4
b) 3y = 18
y = 18/3
y = 6
c) 2x = 0
x = 0/2
x = 0
d) -3x = 6
x = 6/-3
x = -2
e) 2x +4 = 16
2x = 16 - 4
2x = 12
x = 12/2
x = 6
f) 4x = -16
x = -16/4
x = -4
g) -2y = 0
y = 0/-2
y = 0
h) 3y + 1 = 10
3y = 10 - 1
3y = 9
y = 9/3
y = 3