Maggie is 12 years old
<h3>Further explanation</h3>
To solve this problem, first step would be create two variables, x and y as follow:
x = Maggie's age
y = Her brother's age
From the problem above we can make two equations which are
y = 3x - 7 ⇒ first equation
x + y = 41 ⇒ second equation
Then the next step, we will substitute the first equation (y = 3x - 7) into second equation (x + y = 41)
x + (3x -7) = 41
x + 3x - 7 = 41
4x = 48
x = 12
So, Maggie's age is 12 years old, while her brother is 29 years old
<h3>Learn more</h3>
Substitution method brainly.com/question/10852714
Substitution and elimination method in solving problem brainly.com/question/316466
Keywords: substitution, linear program, calculate age