Y=0.8(220-x)

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Solution for Y=0.8(220-x) equation: 



=0.8(220-Y)

We move all terms to the left:

-(0.8(220-Y))=0

We add all the numbers together, and all the variables

-(0.8(-1Y+220))=0



We calculate terms in parentheses: -(0.8(-1Y+220)), so:

0.8(-1Y+220)

We multiply parentheses

-0.8Y+176

Back to the equation:

-(-0.8Y+176)



We get rid of parentheses

0.8Y-176=0

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

0.8Y=176

Y=176/0.8

Y=220

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