(12+X)/(150+x)=(40-x)/(100-x)如何计算?急
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(12+X)/(150+x)=(40-x)/(100-x)如何计算?急
![(12+X)/(150+x)=(40-x)/(100-x)如何计算?急](/uploads/image/z/19796739-51-9.jpg?t=%2812%2BX%29%2F%28150%2Bx%29%3D%2840-x%29%2F%28100-x%29%E5%A6%82%E4%BD%95%E8%AE%A1%E7%AE%97%3F%E6%80%A5)
(12+x)*(100-x)=(40-x)*(150+x)
1200-12x+100x-x^2=6000+40x-150x-x^2
198x=4800
x=24.2424242424
1200-12x+100x-x^2=6000+40x-150x-x^2
198x=4800
x=24.2424242424