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30=2x+2(x+3)
We move all terms to the left:
30-(2x+2(x+3))=0
We calculate terms in parentheses: -(2x+2(x+3)), so:We get rid of parentheses
2x+2(x+3)
We multiply parentheses
2x+2x+6
We add all the numbers together, and all the variables
4x+6
Back to the equation:
-(4x+6)
-4x-6+30=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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