Question

×+7×4=40 решение с проверкой​

Answer 1

х + 7 * 4 = 40

х + 28 = 40

х = 40 - 28

х = 12

Проверка:

12 + 7 * 4 = 40

12 + 28 = 40

40 = 40

Answer 2

$x + 7 \times 4 = 40 \\ x + 28 = 40 \\ x = 40 - 28 \\ x = 12$

Проверка:

$12 + 7 \times 4 = 40 \\ 12 + 28 = 40 \\ 40 = 40$