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20+3x+2(x-3)=29
We move all terms to the left:
20+3x+2(x-3)-(29)=0
We add all the numbers together, and all the variables
3x+2(x-3)-9=0
We multiply parentheses
3x+2x-6-9=0
We add all the numbers together, and all the variables
5x-15=0
We move all terms containing x to the left, all other terms to the right
5x=15
x=15/5
x=3
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