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x = 204 - 58
x= 146
b) - 4 × 12 = 8
- 48 = 8
= 8 + 48
= 56
Despejas x
x = 56 x 2
x = 112
c) =3
(x-31) = 3 × 11
x-31 = 33
x = 33+31
x = 64
d) + 3 × x = 59
5 + 3x = 59
3x = 59-5
3x = 54
x =
x = 18
e) 9x + 27 = 160 + 11
9x + 27 = 171
9x = 171 -27
9x = 144
x =
x = 16