Question

3 (x-1) + x =2 (x +1)-1

Answer 1

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3(x - 1) + x = 2(x + 1) - 1

3x - 3 + x = 2x + 2 - 1

4x - 3 = 2x + 1

4x - 3 - 2x = 1

2x - 3 = 1

2x = 1 + 3

2x = 4

x = 4/2

x = 2 ← Resposta

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Att: MarcosPCV