7.5=-2.5(1+2n)

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Solution for 7.5=-2.5(1+2n) equation: 



7.5=-2.5(1+2n)

We move all terms to the left:

7.5-(-2.5(1+2n))=0

We add all the numbers together, and all the variables

-(-2.5(2n+1))+7.5=0



We calculate terms in parentheses: -(-2.5(2n+1)), so:

-2.5(2n+1)

We multiply parentheses

-5n-2.5

Back to the equation:

-(-5n-2.5)



We get rid of parentheses

5n+2.5+7.5=0

We add all the numbers together, and all the variables

5n+10=0

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

5n=-10

n=-10/5

n=-2

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