7x+105=12x-90

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Solution for 7x+105=12x-90 equation: 



7x+105=12x-90

We move all terms to the left:

7x+105-(12x-90)=0

We get rid of parentheses

7x-12x+90+105=0

We add all the numbers together, and all the variables

-5x+195=0

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

-5x=-195

x=-195/-5

x=+39

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