y-(0.2y)=80

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Solution for y-(0.2y)=80 equation: 



y-(0.2y)=80

We move all terms to the left:

y-(0.2y)-(80)=0

We add all the numbers together, and all the variables

y-(+0.2y)-80=0

We get rid of parentheses

y-0.2y-80=0

We add all the numbers together, and all the variables

0.8y-80=0

We move all terms containing y to the left, all other terms to the right

0.8y=80

y=80/0.8

y=100

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