Question

2X+3×0.8X+5×0.8×0.8X=38怎么解？快、急

要详细，不要只说个解得多少。

Answer 1

2X+3×0.8X+5×0.8×0.8X=38
2X+2.4X+0.32X=38
(2+2.4+3.2)X=38
7.6X=38
X=38÷7.6
X=5

Answer 2

2X+3×0.8X+5×0.8×0.8X=38
2X+2.4X+3.2X=38
7.6X=38
X=38/7.6=5

Answer 3

2X+3×0.8X+5×0.8×0.8X=38
2X+2.4X+3.2X=38
7.6X=38
X=38/7.6
X=5

Answer 4

2X+3×0.8X+5×0.8×0.8X=38
2x+2.4x+3.2x=38
7.6x=38
x=5

追问

很赞、谢谢、