Question

Даю 30 баллов пж помогите
-7 (3/28x+1)=-8

Answer 1

Ответ:

$x = 1\frac{1}{3}$

Пошаговое объяснение:

-7 (3/28x+1)=-8

-21/28 х - 7 = -8

-21/28 х = -1

х = (-1) : (-21/28)

$x = \frac{28}{21} = 1\frac{7}{21} = 1\frac{1}{3}$

Проверка:

$-7(\frac{3}{28} * 1\frac{1}{3} + 1) = -8\\-7(\frac{3*4}{28*3} + 1) = -8\\-7(\frac{1}{7} + 1) = -8\\-7 * 1\frac{1}{7} = -8\\- \frac{56}{7} = -8\\-8 = -8$