Question

qué número sumado -2/3 da -1
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Answer 1

$x + ( - \frac{2}{3} ) = - 1 \\ x - \frac{2}{3} = - 1 \\ x = - 1 + \frac{2}{3} \\ x = - \frac{3}{3} + \frac{2}{3} \\ x = - \frac{1}{3}$