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-7(1+2n)=7(3-6n)
We move all terms to the left:
-7(1+2n)-(7(3-6n))=0
We add all the numbers together, and all the variables
-7(2n+1)-(7(-6n+3))=0
We multiply parentheses
-14n-(7(-6n+3))-7=0
We calculate terms in parentheses: -(7(-6n+3)), so:We get rid of parentheses
7(-6n+3)
We multiply parentheses
-42n+21
Back to the equation:
-(-42n+21)
-14n+42n-21-7=0
We add all the numbers together, and all the variables
28n-28=0
We move all terms containing n to the left, all other terms to the right
28n=28
n=28/28
n=1
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