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9x-7=-7x-11
We move all terms to the left:
9x-7-(-7x-11)=0
We get rid of parentheses
9x+7x+11-7=0
We add all the numbers together, and all the variables
16x+4=0
We move all terms containing x to the left, all other terms to the right
16x=-4
x=-4/16
x=-1/4
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