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-280x-320=-16-261x
We move all terms to the left:
-280x-320-(-16-261x)=0
We add all the numbers together, and all the variables
-280x-(-261x-16)-320=0
We get rid of parentheses
-280x+261x+16-320=0
We add all the numbers together, and all the variables
-19x-304=0
We move all terms containing x to the left, all other terms to the right
-19x=304
x=304/-19
x=-16
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