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56=2.8x
We move all terms to the left:
56-(2.8x)=0
We add all the numbers together, and all the variables
-(+2.8x)+56=0
We get rid of parentheses
-2.8x+56=0
We move all terms containing x to the left, all other terms to the right
-2.8x=-56
x=-56/-2.8
x=+20
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