解方程2/(x+8)+5/(x+9)=3/(x+15)+4/(x+6)
问题描述:
解方程2/(x+8)+5/(x+9)=3/(x+15)+4/(x+6)
答
移项5/x+9-4/x+6=3/x+15-2/x+8
x-6/(x+9)(x+6)=x-6/(x+15)(x+8)
x=6
-33/4