4x+31=7x-8

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Solution for 4x+31=7x-8 equation: 



4x+31=7x-8

We move all terms to the left:

4x+31-(7x-8)=0

We get rid of parentheses

4x-7x+8+31=0

We add all the numbers together, and all the variables

-3x+39=0

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

-3x=-39

x=-39/-3

x=+13

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