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