解一道方程500/(X-25) +5 + 30(X-25)/X=35

问题描述:

解一道方程500/(X-25) +5 + 30(X-25)/X=35
步骤写清楚,不要直接把答案写上

500/(X-25) +5 + 30(X-25)/X=35
500/(x-25)+30(x-25)/x=30
50/(x-25)+3(x-25)/x=3
50x+3(x-25)²=3x(x-25)
50x+3x²-150x+1875=3x²-75x
3x²+50x-150x+75x-3x²=-1875
-25x=1875
x=75