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6+5(-3x-9)=-51
We move all terms to the left:
6+5(-3x-9)-(-51)=0
We add all the numbers together, and all the variables
5(-3x-9)+57=0
We multiply parentheses
-15x-45+57=0
We add all the numbers together, and all the variables
-15x+12=0
We move all terms containing x to the left, all other terms to the right
-15x=-12
x=-12/-15
x=4/5
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