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12x=4(1x+5)
We move all terms to the left:
12x-(4(1x+5))=0
We add all the numbers together, and all the variables
12x-(4(x+5))=0
We calculate terms in parentheses: -(4(x+5)), so:We get rid of parentheses
4(x+5)
We multiply parentheses
4x+20
Back to the equation:
-(4x+20)
12x-4x-20=0
We add all the numbers together, and all the variables
8x-20=0
We move all terms containing x to the left, all other terms to the right
8x=20
x=20/8
x=2+1/2
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