已知2X+3Y=0,求(5X+4Y)/(3X-2Y)的值
问题描述:
已知2X+3Y=0,求(5X+4Y)/(3X-2Y)的值
答
2X+3Y=0
2X=-3Y
X=-1.5Y
(5X+4Y)/(3X-2Y)
=[5*(-1.5Y)+4Y]/[3*(-1.5Y)-2Y]
=(-7.5Y+4Y)/(-4.5Y-2Y)
=(-3.5Y)/(-6.5Y)
=35/65
=7/13