数学题0.4/(4-x)=1/4[请详解】

问题描述:

数学题0.4/(4-x)=1/4[请详解】

0.4/(4-x)=1/4
=> 0.4 ×4 = (4-x)×1
=> 1.6 = 4 - x
=> x = 2.4