(4x+3)-(8-4x)+(5x+6)=8
4х+3-8+4х+5х+6=8; 4х+4х+5х=8-3+8-6; 13х=7; х=7:13;
(4x+3)-(8-4x)+(5x+6)=8 4x+3-8+4x+5x+6=8 13x=8-1 13x=7:13 x=7/13