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9(x+6)+x+3+2x=5x+689-2
We move all terms to the left:
9(x+6)+x+3+2x-(5x+689-2)=0
We add all the numbers together, and all the variables
9(x+6)+x+2x-(5x+687)+3=0
We add all the numbers together, and all the variables
3x+9(x+6)-(5x+687)+3=0
We multiply parentheses
3x+9x-(5x+687)+54+3=0
We get rid of parentheses
3x+9x-5x-687+54+3=0
We add all the numbers together, and all the variables
7x-630=0
We move all terms containing x to the left, all other terms to the right
7x=630
x=630/7
x=90
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