Question

$3 + 5 = 4 + 20$
$2 + 4 = x - 2 + 5$
$3 + 6 = 4 + x$
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Answer 1

Resposta:

$20x = 60 \\ x = \frac{60}{20} \\ x = 3$

$4x + ( - 8) = 20 \\ 4x = 20 + 8 \\ 4x = 28 \\ x = \frac{28}{4} \\ x = 7$

$3x = 24 \\ x = \frac{24}{3} \\ x = 8$