(2500/X-10)(X+1)-2500=440

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(2500/X-10)(X+1)-2500=440(2500/X-10)(X+1)-2500=440(2500/X-10)(X+1)-2500=440(250/X-1)(X+1)-250=44(250

(2500/X-10)(X+1)-2500=440
(2500/X-10)(X+1)-2500=440

(2500/X-10)(X+1)-2500=440
(250/X-1)(X+1)-250=44
(250/X-1)(X+1)=294
250+250/x-x-1=294
250/x-x=-5
250/x=x-5
x²-5x-250=0
x=[5±√(5²+4×250)]/2
=(5±5√41)/2

(2500/X-10)(X+1)-2500=440
(2500/X-10)(X+1)=2940
2500(x+1)=2940(x-10)
2500x+2500=2940x-29400
2500x-2940x=-29400-2500
-440x=-31900
∴x=72.5