6-5x=2x-1 4(3-x)=x+7 -4x+3=2x 6-5x=-2x+9
1. 7=7х; х=1 2. 12-4х=х+7; 5=5х; х=1 3. 3=6х; х=1/2 4. 3х=-3; х=-1