Question

Решите уравнение |х|=7; |х+9|=0; |х+1|=5

Answer 1

1) |x|=7

x=-7

x=7

2) |x+9|=0

x+9=0

x=-9

3) |x+1|=5

x+1=5; x=4

x+1=-5; x=-6