31=5x-8+4x

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Solution for 31=5x-8+4x equation: 



31=5x-8+4x

We move all terms to the left:

31-(5x-8+4x)=0

We add all the numbers together, and all the variables

-(9x-8)+31=0

We get rid of parentheses

-9x+8+31=0

We add all the numbers together, and all the variables

-9x+39=0

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

-9x=-39

x=-39/-9

x=4+1/3

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