0.5x+4x×0.1=27.9怎么解

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0.5x+4x×0.1=27.9怎么解0.5x+4x×0.1=27.9怎么解0.5x+4x×0.1=27.9怎么解0.5x+0.4x=27.9(0.5+0.4)x=27.90.9x=27.9x=27.

0.5x+4x×0.1=27.9怎么解
0.5x+4x×0.1=27.9怎么解

0.5x+4x×0.1=27.9怎么解
0.5x+0.4x=27.9
(0.5+0.4)x=27.9
0.9x=27.9
x=27.9/0.9
x=3.1