8x-(3x+9)=31.

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Solution for 8x-(3x+9)=31. equation: 



8x-(3x+9)=31.

We move all terms to the left:

8x-(3x+9)-(31.)=0

We add all the numbers together, and all the variables

8x-(3x+9)-31=0

We get rid of parentheses

8x-3x-9-31=0

We add all the numbers together, and all the variables

5x-40=0

We move all terms containing x to the left, all other terms to the right

5x=40

x=40/5

x=8

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