8(X一2)=2(X十7)解:8X-16=2X十14 8X一2X=14+16 6X=30 X=5
8(x-2)=2(x+7)8x-16=2x+148x+2x=14+1610x=30x=3 (4x+8):6=(6x-4):55*(4x+8)=6*(6x-4)20x+40=36x-2420x-36x=-24-40-16x=-64x=4