Question

Помогите с уравнением

Answer 1

-9d - 55 +160 =150

-9d + 105 = 150

-9d = 150 - 105

-9d = 45

d = -5

Answer 2

$\frac{-9d-55}{10}+16=15\\\\\frac{-9d-55}{10}=-1\\\\-9d-55=-10\\\\9d=10-55\\\\9d=-45\\\\d=-5\\\\Otvet:\boxed{-5}$