Решить уравнения 1. 4х+5.5=2х-2.5 2. 3х-(9х-3)=3*(4-2х)

Question

Решить уравнения

1. 4х+5.5=2х-2.5
2. 3х-(9х-3)=3*(4-2х)

Answer 1

1)4х+5.5=2х-2.5
4х-2х=-2.5-5.5
2х=-8
х=-4
2)3х-(9х-3)=3•(4-2х)
3х-9х+3=12-6х
-12х=9
х=-0.75

Answer 2

4x+5,5=2x-2,5;
4x-2x=-2,5-5,5;
2x=-8;
x=-8:4;
x=-4