12x-45=15x+75

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Solution for 12x-45=15x+75 equation: 



12x-45=15x+75

We move all terms to the left:

12x-45-(15x+75)=0

We get rid of parentheses

12x-15x-75-45=0

We add all the numbers together, and all the variables

-3x-120=0

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

-3x=120

x=120/-3

x=-40

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