Apply 7 The ratio of kids to adults at a school festival is 11 : 7. Suppose there are a total
of 810 kids and adults at the festival. How many adults are at the festival?

this is your answer. if I am right so

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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!