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2(8.40+-2y)+4y=16.80
We move all terms to the left:
2(8.40+-2y)+4y-(16.80)=0
We add all the numbers together, and all the variables
2(-2y)+4y-(16.8)=0
We add all the numbers together, and all the variables
4y+2(-2y)-16.8=0
We multiply parentheses
4y-4y-16.8=0
We add all the numbers together, and all the variables
-16.8!=0
There is no solution for this equation
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