Answered

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Maggie's brother is three years younger
than twice her
age. The sum of their
ages
is 24. How old is Maggie?

Sagot :

Maliadabratidn

For this case, the first thing we must do is define variables.

We have then:

x: Maggie's age

y: Age of Maggie's brother

We write the system of equations that models the problem.

We have then:

We solve the system of equations.

For this, we use substitution:

From here, we clear the value of x:

Answer:

Maggie is 9 years old

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