15=-7(x+1)+1

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Solution for 15=-7(x+1)+1 equation: 



15=-7(x+1)+1

We move all terms to the left:

15-(-7(x+1)+1)=0



We calculate terms in parentheses: -(-7(x+1)+1), so:

-7(x+1)+1

We multiply parentheses

-7x-7+1

We add all the numbers together, and all the variables

-7x-6

Back to the equation:

-(-7x-6)



We get rid of parentheses

7x+6+15=0

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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