-42+7x=39+4x

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Solution for -42+7x=39+4x equation: 



-42+7x=39+4x

We move all terms to the left:

-42+7x-(39+4x)=0

We add all the numbers together, and all the variables

7x-(4x+39)-42=0

We get rid of parentheses

7x-4x-39-42=0

We add all the numbers together, and all the variables

3x-81=0

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

3x=81

x=81/3

x=27

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