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28-4x=7(-2x-6)
We move all terms to the left:
28-4x-(7(-2x-6))=0
We calculate terms in parentheses: -(7(-2x-6)), so:We get rid of parentheses
7(-2x-6)
We multiply parentheses
-14x-42
Back to the equation:
-(-14x-42)
-4x+14x+42+28=0
We add all the numbers together, and all the variables
10x+70=0
We move all terms containing x to the left, all other terms to the right
10x=-70
x=-70/10
x=-7
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