3x-15=-x+42

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Solution for 3x-15=-x+42 equation: 



3x-15=-x+42

We move all terms to the left:

3x-15-(-x+42)=0

We add all the numbers together, and all the variables

3x-(-1x+42)-15=0

We get rid of parentheses

3x+1x-42-15=0

We add all the numbers together, and all the variables

4x-57=0

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

4x=57

x=57/4

x=14+1/4

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