Samuel has a collection of toy cars. His favorites are the 27 red ones, which make up 90% of his collection. How many toy cars does Samuel have?

30

Step-by-step explanation:

If 27 is 90%, then 27/x=9/10. Cross multiply to get 270=9x. Divide by 9 to get 30

(I put the wrong answer the first time, my bad sorry)

not solvable

step-by-step explanation:

we need more information, or at least an

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.