Answer:
20 years old
Step-by-step explanation:
Donnie is 7 years old. Donnie's age is 3 years less than half of Ana's age.
The relationship between the ages can be modeled by the equation
1/2x - 3 = 7, where
x is Ana's age.
Hence:
= x/2 - 3 = 7
Add 3 to both sides
1/2x - 3 + 3 = 7 + 3
1/2x = 10
x/2 = 10
Cross Multiply
x = 2 × 10
x = 20 years old.
Therefore, Ana is 20 years old.
