设A车间原来有x人,B车间原来有y人.由题意得:
x=3/2·y (1)
x-18=5/4·(y+18) (2)
(1)式和(2)式联立,化简得:
2x=3y (3)
4x-72=5y+90 (4)
把(3)式代入(4)式,化简可得:y=162 (5)
把(5)式代入(1)式,得:x=243
答:A车间原来有243人,B车间原来有162人.
设A车间原来有x人,B车间原来有y人.由题意得:
x=3/2·y (1)
x-18=5/4·(y+18) (2)
(1)式和(2)式联立,化简得:
2x=3y (3)
4x-72=5y+90 (4)
把(3)式代入(4)式,化简可得:y=162 (5)
把(5)式代入(1)式,得:x=243
答:A车间原来有243人,B车间原来有162人.