-63=15x+42

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Solution for -63=15x+42 equation: 



-63=15x+42

We move all terms to the left:

-63-(15x+42)=0

We get rid of parentheses

-15x-42-63=0

We add all the numbers together, and all the variables

-15x-105=0

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

-15x=105

x=105/-15

x=-7

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