3x+15=57-4x

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Solution for 3x+15=57-4x equation: 



3x+15=57-4x

We move all terms to the left:

3x+15-(57-4x)=0

We add all the numbers together, and all the variables

3x-(-4x+57)+15=0

We get rid of parentheses

3x+4x-57+15=0

We add all the numbers together, and all the variables

7x-42=0

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

7x=42

x=42/7

x=6

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