方程；8X-3(X-5)=6X=(X-1),5X-X+7X-3X=0.72
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方程；8X-3(X-5)=6X=(X-1),5X-X+7X-3X=0.72方程；8X-3(X-5)=6X=(X-1),5X-X+7X-3X=0.72方程；8X-3(X-5)=6X=(X-1),5X-X
方程；8X-3(X-5)=6X=(X-1),5X-X+7X-3X=0.72
方程；8X-3(X-5)=6X=(X-1),5X-X+7X-3X=0.72
方程；8X-3(X-5)=6X=(X-1),5X-X+7X-3X=0.72
8X-3(X-5)=6X+(X-1)
8x-3x+15=6x+x-1
5x+15=7x-1
7x-5x=15+1
2x=16
x=8
5X-X+7X-3X=0.72
8x=0.72
x=0.72÷8
x=0.09
8X-3(X-5)=6X+(X-1)
8x-3x+15=6x+x-1
2x=16
x=8
5X-X+7X-3X=0.72
8x=0.72
x=0.09
8X-3X+15=6X+X-1
8X-3X-6X-X=-1-15
-2X=-16
X=8
8X=0.72
X=0.09