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28+8x=4(1+3x)
We move all terms to the left:
28+8x-(4(1+3x))=0
We add all the numbers together, and all the variables
8x-(4(3x+1))+28=0
We calculate terms in parentheses: -(4(3x+1)), so:We get rid of parentheses
4(3x+1)
We multiply parentheses
12x+4
Back to the equation:
-(12x+4)
8x-12x-4+28=0
We add all the numbers together, and all the variables
-4x+24=0
We move all terms containing x to the left, all other terms to the right
-4x=-24
x=-24/-4
x=+6
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