Question

(21y+63) (1,4 - 0,2) = 0

Answer 1

Ответ:

$y = - 3$

Объяснение:

$(21y + 63)(1.4 - 0.2) = 0$

$(21y + 63) \times 1.2 = 0$

$1.2(21y + 63) = 0$

$21y + 63 = 0 \div 1.2$

$21y + 63 = 0$

$21y = 0 - 63$

$21y = - 63$

$y = - 63 \div 21$

$y = - 3$

Проверка:

$(21 \times ( - 3) + 63)(1.4 - \\ - 0.2) = 0$

$0 \times 1.2 = 0$

$0 = 0$