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2(x+6)+4(x+6)=-30
We move all terms to the left:
2(x+6)+4(x+6)-(-30)=0
We add all the numbers together, and all the variables
2(x+6)+4(x+6)+30=0
We multiply parentheses
2x+4x+12+24+30=0
We add all the numbers together, and all the variables
6x+66=0
We move all terms containing x to the left, all other terms to the right
6x=-66
x=-66/6
x=-11
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