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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