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20x-8=7-8
We move all terms to the left:
20x-8-(7-8)=0
We add all the numbers together, and all the variables
20x-8-(-1)=0
We add all the numbers together, and all the variables
20x-7=0
We move all terms containing x to the left, all other terms to the right
20x=7
x=7/20
x=7/20
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