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10(3+x)=4x+30
We move all terms to the left:
10(3+x)-(4x+30)=0
We add all the numbers together, and all the variables
10(x+3)-(4x+30)=0
We multiply parentheses
10x-(4x+30)+30=0
We get rid of parentheses
10x-4x-30+30=0
We add all the numbers together, and all the variables
6x=0
x=0/6
x=0
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