数学题方程7X-3.4X=0.72怎么写

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数学题方程7X-3.4X=0.72怎么写
数学题方程7X-3.4X=0.72怎么写

数学题方程7X-3.4X=0.72怎么写
7X-3.4X=0.72
(7-3.4)x=0.72
3.6x=0.72
x=0.72÷3.6
x=0.2

3.6x=0.72
得:x=0.2

7X-3.4X=0.72
(7-3.4)x=0.72
3.6x=0.72
x=0.72÷3.6
x=0.2

3.6x=0.72
x=0.27除以3.6
X=0.075

7x-3.4x=0.72
3.6x=0.72
x=0.72÷3.6
x=2.592