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142=-66+13x
We move all terms to the left:
142-(-66+13x)=0
We add all the numbers together, and all the variables
-(13x-66)+142=0
We get rid of parentheses
-13x+66+142=0
We add all the numbers together, and all the variables
-13x+208=0
We move all terms containing x to the left, all other terms to the right
-13x=-208
x=-208/-13
x=+16
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