要使(4-x)/(4-2x)的值與(x-4)/(x-5)的值相等，x=?

熱心網(wǎng)友

(4-x)/(4-2x)=(x-4)/(x-5)(4-x)/(4-2x)=(4-x)/(5-x)4-2x=5-x,x=-1

熱心網(wǎng)友

(4-x)/(4-2x)=(x-4)/(x-5)---(4-x)/(4-2x)-(x-4)/(x-5)=0---[(4-x)(x-5)-(x-4)(4-2x)]/[(4-2x)(x-5)]=0---(4-x)[(x-5)+(4-2x)]=0.[x2;& x5]---(4-x)(-1-x)=0---x1=4;x2=-1.