144=7x+5x

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Solution for 144=7x+5x equation: 



144=7x+5x

We move all terms to the left:

144-(7x+5x)=0

We add all the numbers together, and all the variables

-(+12x)+144=0

We get rid of parentheses

-12x+144=0

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

-12x=-144

x=-144/-12

x=+12

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