Question

Решите уравнение плиззззз!!!!​

Answer 1

а)

$- 12 - (15 + x) = 28 \\ - 12 - 15 - x = 28 \\ - x = 28 + 12 + 15 \\ - x = 40 + 15 \\ - x = 55 \\ x = - 55$

б)

$-(4 - x) + 15 = 12 \\ - 4 + x + 15 = 12 \\ x = 12 + 4 - 15 \\ x = 16 - 15 \\ x = 1$

в)

$( x + 9) - 18 = - 50 \\ x + 9 - 18 = - 50 \\ x = - 50 - 9 + 18 \\ x = - 59 + 18 \\ x = - 41$