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3(7+8x)-3(1+8x)=18
We move all terms to the left:
3(7+8x)-3(1+8x)-(18)=0
We add all the numbers together, and all the variables
3(8x+7)-3(8x+1)-18=0
We multiply parentheses
24x-24x+21-3-18=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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