1.(4-x）÷3=2-x 4-x=3(2-x) 4-x=6-3x -x+3x=6-4 2x=2 x=1 2.设乙数是x,则甲数是27+x,根据题意得10x=27+x 9x=27 x=3 所以乙数是3,甲数是30
