2000/X-50=2000/(X+2),实在忘了怎么解了:(
问题描述:
2000/X-50=2000/(X+2),实在忘了怎么解了:(
答
同乘以x(x-2)得
x^2+2x=80
(x+1)^2=9^2
x+1=9x=8
x+1=-9 x=-10