John is mixing paint. there is a proportional relationship between the number of cans of black paint and the number of cans of white paint she mixes together.

what is the constant of proportionality?

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!