Решите уравнения:1) 5х+7-2х-(3-2х+х)=02) 7-0,2х-(21,28-1,6)=0

Question

Решите уравнения:
1) 5х+7-2х-(3-2х+х)=0
2) 7-0,2х-(21,28-1,6)=0

Answer 1

1)5х+7-2х-(3-2х+х)=0 . 3*x+7-(3-2*x+x)=0 . 3*x+7-(3-x)=0 . 3*x+7-3+x=0 . 3*x+4+x=0 . 4*x+4=0 x=-1 2)7-0,2x-(21,28-1,6)=0 . 7-0.2*x-19.68=0 . -12.68-0.2*x=0 x=-12.68/0.2=-63.4.