45=x+(x+15)

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Solution for 45=x+(x+15) equation: 



45=x+(x+15)

We move all terms to the left:

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



We calculate terms in parentheses: -(x+(x+15)), so:

x+(x+15)

We get rid of parentheses

x+x+15

We add all the numbers together, and all the variables

2x+15

Back to the equation:

-(2x+15)



We get rid of parentheses

-2x-15+45=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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