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x除以3%x除以4.5=2.5怎么解

1、2/9x=1-3/5 x=2/5÷2/9 x=2/5×9/2 x=9/5

X+13%X-28%X=3.4 0.85X=3.4 X=3.4÷0.85 X=4

X+0.0867X=54339, 1.0867X=54339, X=54339÷1.0867, X≈50003.68。

3.38x=7.8 x=7.8÷3.38 x=30/13

(1)9七% X-21% X=4.29, b5% X=4.29,b5% X÷b5%=4.29÷b5%, X=5.b2;(2)1.b-2.5X=0.45,1.b-2.5X+2.5X=0.45+2.5X, 1.b=0.45+2.5X, 1.b-0.45=0.45+2.5X-0.45, 1.25=2.5X, 1.25÷2.5=2.5X÷2.5, X=0.5.

解方程:0.75x十3X80%x=7·5 解:0.75x十3X80%x=7·5 0.75x+2.4x=7.5 3.15x=7.5 x=7.5÷3.15 x=2.3809...

x+3×0.0425x=33825 (1+0.1275)x=33825 x=33825÷1.1275 x=30000

解由题知2x+0.3x=9.2 即2.3x=9.2 两边除以2.3 解得x=4.

x+3×4.25%x=33825 解:x+0.1275x=33825 1.1275x=33825 x=33825÷1.1275 x=30000

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