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(6x-5)+(7x+9)=13x+4
We move all terms to the left:
(6x-5)+(7x+9)-(13x+4)=0
We get rid of parentheses
6x+7x-13x-5+9-4=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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