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28=2x+(4x+x)
We move all terms to the left:
28-(2x+(4x+x))=0
We add all the numbers together, and all the variables
-(2x+(+5x))+28=0
We calculate terms in parentheses: -(2x+(+5x)), so:We move all terms containing x to the left, all other terms to the right
2x+(+5x)
We get rid of parentheses
2x+5x
We add all the numbers together, and all the variables
7x
Back to the equation:
-(7x)
-7x=-28
x=-28/-7
x=+4
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