Question

а)(18-3х)-(4+2х)=-6
б) 21+(20-4х)-(11-2х)=о
Помогите решить

Answer 1

а)(18-3х)-(4+2х)=-6
18-3x-4-2x=-6
5x=20
x=4

б) 21+(20-4х)-(11-2х)=0
21+20-4x-11+2x=0
2x=30
x=15