(x-10)/x*100%=50%求解

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(x-10)/x*100%=50%求解(x-10)/x*100%=50%求解(x-10)/x*100%=50%求解x-10=1/2*x1/2*x=10x=10*2x=20

(x-10)/x*100%=50%求解
(x-10)/x*100%=50%求解

(x-10)/x*100%=50%求解
x-10=1/2*x
1/2*x=10
x=10*2
x=20