7x+31=3(x+9)

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Solution for 7x+31=3(x+9) equation: 



7x+31=3(x+9)

We move all terms to the left:

7x+31-(3(x+9))=0



We calculate terms in parentheses: -(3(x+9)), so:

3(x+9)

We multiply parentheses

3x+27

Back to the equation:

-(3x+27)



We get rid of parentheses

7x-3x-27+31=0

We add all the numbers together, and all the variables

4x+4=0

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

4x=-4

x=-4/4

x=-1

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