31=42-3(4-5w)

Solution for 31=42-3(4-5w) equation:

31=42-3(4-5w)

We move all terms to the left:

31-(42-3(4-5w))=0

We add all the numbers together, and all the variables

-(42-3(-5w+4))+31=0


We calculate terms in parentheses: -(42-3(-5w+4)), so:

42-3(-5w+4)

determiningTheFunctionDomain
-3(-5w+4)+42

We multiply parentheses

15w-12+42

We add all the numbers together, and all the variables

15w+30

Back to the equation:

-(15w+30)


We get rid of parentheses

-15w-30+31=0

We add all the numbers together, and all the variables

-15w+1=0

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

-15w=-1

w=-1/-15

w=1/15