Maths question problem solving help

John asked Mirriam to tell him her age. She replied, "If you divide my age by 3, you wil get the same answer as when you divide 75 by my age." How old is Sarah?

I think the answer is 12, but im not sure, help please?

x/3 = 75/x

Cross multiply:

x^2 = 225

x = 15

Miriam is 15 years old. Quite the annoying answer for a teenage girl.

Have you asked about the wrong person's age? John asked Mirriam. Who is Sarah then?

Anyway, assuming the age in question is of Mirriam, for a simple equation by the given facts

Let,
Mirriam's age = m years

then m/3 = 75/m => m*m = 75*3 => m*m = 225 => m*m =15*15 => m = 15

Age of Mirriam = 15 years.

Let's assume it is Mirriam's age we're looking for.
If this age is x, then we get that x/3 = 75/x. Multiply both sides by 3x, and we get: x^2 = 225, which means x = 15.

let Mirriam's age be x
so x/3=75/x
wen u cross multiply ull get x^2=75*3.

x^2=225
so x=15

Mirriam is 15 years old.

Trick question. That's Mirriam's age not Sarrah's. She was not mentioned. Put insufficient data.

15

15
15/3=5
75/15=5