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4(x+3)+2x=30
We move all terms to the left:
4(x+3)+2x-(30)=0
We add all the numbers together, and all the variables
2x+4(x+3)-30=0
We multiply parentheses
2x+4x+12-30=0
We add all the numbers together, and all the variables
6x-18=0
We move all terms containing x to the left, all other terms to the right
6x=18
x=18/6
x=3
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