165=7x+15-4x

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Solution for 165=7x+15-4x equation: 



165=7x+15-4x

We move all terms to the left:

165-(7x+15-4x)=0

We add all the numbers together, and all the variables

-(3x+15)+165=0

We get rid of parentheses

-3x-15+165=0

We add all the numbers together, and all the variables

-3x+150=0

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

-3x=-150

x=-150/-3

x=+50

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