1) 5 (x-7)=3 (x-4)-7; 5x-35=3x-12-27; 2x=35-39; 2x=-4; x=-2; 2) 3x+2 (2x-3)=8-7 (x-2); 3x+4x-6=8-7x+14; 14x=28; x=2