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(x*3)=30
We move all terms to the left:
(x*3)-(30)=0
We add all the numbers together, and all the variables
(+x*3)-30=0
We get rid of parentheses
x*3-30=0
Wy multiply elements
3x-30=0
We move all terms containing x to the left, all other terms to the right
3x=30
x=30/3
x=10
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