(1)x-2/2=2x+3/5; 5(x-2)=2(2x+3)5x-10=4x+6x=16(2)x+1/2-x-1/4=1;2(x+1)-(x-1)=42x+2-x+1=4x=1 (3)2/7(3x+7)=2-3/2x;4(3x+7)=28-21x12x+28=28-21x33x=0x=0