(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)/x=0.4怎么算
两边乘以x
2.5-x=0.4x
x+0.4x=2.5
1.4x=2.5
x=2.5÷1.4
x=25/14=1+11/14
x=1又14分之11

两边乘以x
2.5-x=0.4x
x+0.4x=2.5
1.4x=2.5
x=2.5÷1.4
x=25/14=1+11/14
x=1又14分之11

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

(2.5-x)/x=0.4
(2.5-x)/x=4/10
4x=10(2.5-x)
4x=25-10x
14x=25
x=25/14