a) 9 x = 2 =4 x + 18
b) 4 x - 18 + 3 x = 10
c) 7 x + 1 = x - 7
d) 2 x - 10 + 7 x + 10 = 180
e) 2 x + 5= x + 7 = 18
f) 4 x + 5 = x + 120
g) 7 y - 10 = y + 50
b) 4 x - 18 + 3 x = 10
c) 7 x + 1 = x - 7
d) 2 x - 10 + 7 x + 10 = 180
e) 2 x + 5= x + 7 = 18
f) 4 x + 5 = x + 120
g) 7 y - 10 = y + 50
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Resposta:
a)R:22
b)R:48
c)R:1
d)R:9
e)R:14
f)R:129
g)R:- 3