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9x+2(x-4)=30
We move all terms to the left:
9x+2(x-4)-(30)=0
We multiply parentheses
9x+2x-8-30=0
We add all the numbers together, and all the variables
11x-38=0
We move all terms containing x to the left, all other terms to the right
11x=38
x=38/11
x=3+5/11
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