morfass 2х+(3х+1)=4
2х+3х+1=4
5х=4-1
х=3:5
х=3/5=0,6
2х-(х-1)=3
2х-х+1=3
х=3-1
х=2

miron2077

Verified answer

2х+3x+1=4
5x=4-1
5x=3
x=5/3

2x-x+1=3
x=3-1
x=2