Question

Решите плиз
1)|х|+3=8
2)|х|-1,3=1,2
3)|х+2,1|=3

Answer 1

1)х=-11 2)х=-2.5 3)х=-5.1

Answer 2

IxI=8-3=5
x₁=5        x₂=-5
IxI=1.2+1.3=2.5
x₁=2.5    x₂=-2.5
Ix+2.1I=3
x₁+2.1=3
x₁=3-2.1=0.9
x₂+2.1=-3
x₂=-3-2.1=-5.1