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28=4(2x+1)
We move all terms to the left:
28-(4(2x+1))=0
We calculate terms in parentheses: -(4(2x+1)), so:We get rid of parentheses
4(2x+1)
We multiply parentheses
8x+4
Back to the equation:
-(8x+4)
-8x-4+28=0
We add all the numbers together, and all the variables
-8x+24=0
We move all terms containing x to the left, all other terms to the right
-8x=-24
x=-24/-8
x=+3
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