解:1、7x+(3x-8)=x-2(7-3x)10x-8=x-14+6x10x-8=7x-1410x-7x=8-143x=-6x=-22、x+2/3-2x-1/4=1-x + 5/12=1x=5/12-1x=-7/12
7x+(3x-8)=x-2(7-3x) 7x+3x-8=x-14+6x3x=-6x=-2x+2/3-2x-1/4=1-x+2/3-1/4=1-x=3/4-2/3-x=1/12x=-1/12