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2(20-2x)+4x=40
We move all terms to the left:
2(20-2x)+4x-(40)=0
We add all the numbers together, and all the variables
2(-2x+20)+4x-40=0
We add all the numbers together, and all the variables
4x+2(-2x+20)-40=0
We multiply parentheses
4x-4x+40-40=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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