Answer:
72years old
Step-by-step explanation:
Let Devin's age be x
Let Maggie present age be y
If the sum of the ages of Devin and Maggie is 96 years, then;
x+y = 96 .... 1
If by 8 years ago, Devin's age was 4 times Maggie's age, then;
Devin = x - 8
Maggie = y - 8
x-8 = 4(y-8)
x-8 = 4y - 32 ...2
From 1;
x = 96 - y..3
Substitute 3 into 2
96-y - 8 = 4y - 32
-y-4y = -32 - 88
-5y = -120y
y = 120/5
y = 24
Since x = 96-y
x = 96 - 24
x = 72years
Hence Devin will be 72years old now
