(100-x)/x=25% 求x怎么算?

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(100-x)/x=25%求x怎么算?(100-x)/x=25%求x怎么算?(100-x)/x=25%求x怎么算?(100-x)/x=25%(100-x)/x=1/4x=400-4x5x=400x=8

(100-x)/x=25% 求x怎么算?
(100-x)/x=25% 求x怎么算?

(100-x)/x=25% 求x怎么算?
(100-x)/x=25%
(100-x)/x=1/4
x=400-4x
5x=400
x=80

(100-x)/x=25%
100-x=25%x
x+0.25x=100
1.25x=100
x=100÷1.25
x=80

(100-x)/x=25%可化为
(100-x)/x=1/4进而
(100-x)*4=x
400-4x=x
400=5x
x=80