Stefanie's age is 54 and Hannah's age is 18
How to determine their current ages?
Let x represent Stefanie's age and y represent Hannah's age
Presently
x = 3y
Four years ago
x - 4 + y - 4 = 28
Substitute x = 3y in the above equation
3y - 4 + y - 4 = 28
Evaluate the like terms
2y = 36
Divide both sides by 2
y = 18
Substitute y = 18 in x = 3y
x = 3 * 18
Evaluate
x = 54
Hence, Stefanie's age is 54 and Hannah's age is 18
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