(2.5-x)/x=0.4怎么算

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(2.5-x)/x=0.4怎么算
(2.5-x)/x=0.4怎么算

(2.5-x)/x=0.4怎么算
2.5-x=0.4x
1.4x=2.5
x=25/14

2.5-x = 0.4x
2.5=x+0.4x
x=2.5/1.4

交换相乘得2.5-x=0.4x
移项得1.4x=2.5
结果x=25/14

2.5-x=0.4x
1.4x=2.5
x=25/14

x 乘到右边,得2.5-x = 0.4x
两边同时加上x ,得 2.5=1.4x
两边同除1.4,得x=1.79