Question

$390 \div (4x + 3) = 26$
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Answer 1

Решение

$\frac{390}{4x+3} = 26$

$390 = 26(4x+3)$

$390 = 104x + 78$

$390 - 78 = 104x$

$312 = 104x$

$x = \frac{312}{104}$

$x = 3$

Проверка

$\frac{390}{4 * 3 + 3} = 26$

$\frac{390}{15} = 26$

$26 = 26$

Уравнение решено верно