January 2020 1 147 Report
Resolva as seguintes equações:

a) 2x + 9 = 3x
b) 2x + (4-x) = 3 - ( 3x - 6 )
c) 11 - x + 5 = 4x + 22 - 6x
d) z + 12 + z = 12 - z
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