4x+15=x+42

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Solution for 4x+15=x+42 equation: 



4x+15=x+42

We move all terms to the left:

4x+15-(x+42)=0

We get rid of parentheses

4x-x-42+15=0

We add all the numbers together, and all the variables

3x-27=0

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

3x=27

x=27/3

x=9

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