2-3 (2x+2)=5-4x 5-2x=11-7 (x+2) 3x+5+(x+5)=(1-x)+4 10x+9=7x 7x-2=3x+6
1)2-6x-6=5-4x 2-6x-=6-5+4x=0 -9-2x=0 -9=2x x=-9/2 x=-4.5 2)5-2x=11-7(x+2) 5-2x=11-7x-14 5-2x-11+7x+14=0 8+5x=0 8=-5x x=-5/8
4)10x+9=7x
9=7x-10x,9=-3х, x=-3/9,x=-1/3