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2x+9(-7x-9)=-569
We move all terms to the left:
2x+9(-7x-9)-(-569)=0
We add all the numbers together, and all the variables
2x+9(-7x-9)+569=0
We multiply parentheses
2x-63x-81+569=0
We add all the numbers together, and all the variables
-61x+488=0
We move all terms containing x to the left, all other terms to the right
-61x=-488
x=-488/-61
x=+8
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