解方程24-3(x-9)=31-x

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解方程24-3(x-9)=31-x解方程24-3(x-9)=31-x解方程24-3(x-9)=31-x24-3(x-9)=31-x24-3x+27=31-x-3x+x=31-24-27-2x=-20x

解方程24-3(x-9)=31-x
解方程24-3(x-9)=31-x

解方程24-3(x-9)=31-x
24-3(x-9)=31-x
24-3x+27=31-x
-3x+x=31-24-27
-2x=-20
x=10

10

24-3(x-9)=31-x
24-3x+27=31-x
-2x=-20
x=10