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84=7(x+5)
We move all terms to the left:
84-(7(x+5))=0
We calculate terms in parentheses: -(7(x+5)), so:We get rid of parentheses
7(x+5)
We multiply parentheses
7x+35
Back to the equation:
-(7x+35)
-7x-35+84=0
We add all the numbers together, and all the variables
-7x+49=0
We move all terms containing x to the left, all other terms to the right
-7x=-49
x=-49/-7
x=+7
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