y=300-(4(120-y))

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Solution for y=300-(4(120-y)) equation: 



y=300-(4(120-y))

We move all terms to the left:

y-(300-(4(120-y)))=0

We add all the numbers together, and all the variables

y-(300-(4(-1y+120)))=0



We calculate terms in parentheses: -(300-(4(-1y+120))), so:

300-(4(-1y+120))

determiningTheFunctionDomain
-(4(-1y+120))+300



We calculate terms in parentheses: -(4(-1y+120)), so:

4(-1y+120)

We multiply parentheses

-4y+480

Back to the equation:

-(-4y+480)



We get rid of parentheses

4y-480+300

We add all the numbers together, and all the variables

4y-180

Back to the equation:

-(4y-180)



We get rid of parentheses

y-4y+180=0

We add all the numbers together, and all the variables

-3y+180=0

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

-3y=-180

y=-180/-3

y=+60

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