Calcule as equações: a) 3x + 5 = 20 b) 4x – 5 = 13 + x C) 2x + 2 = 12 d) 5x + 3 = 2x – 9 e) 4x – 5 = 2x f) 2(x + 6) = 4(x + 2)
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