(2х+3) - (5х + 11) = 7+(13-2х) (7-10х) - (8-8х) + (10х+6) = -8 (2x+3)+(3x+4)+(5x+5)=12-7x
2х+3-5х-11=7+13-2х 2х-5х+2х=20+11-3 -х=28 х=-28 7-10х-8+8х+10х+6=-8 8х=-8-7+8-6 8х=-13 х=-1,625 2х+3+3х+12+5х+5=12-17х 27х=-8 х=-8/27