5X+6Y=500,4X+1Y=5Y+1X,X>Y,X=?,Y=?
问题描述:
5X+6Y=500,4X+1Y=5Y+1X,X>Y,X=?,Y=?
答
5X 6Y=500等式两边同时乘以3 得15X 18Y=1500
4X 1Y=5Y 1X推导得3X-4Y=0等式两边同时乘以5得15X-20Y=0
所以15X 18Y-15X 20Y=1500
Y=125/3 X=500/9