Answer:
Eva is 17 years old
Step-by-step explanation:
First, we know that Ana is 12 years younger than Eva.
This means that, if Eva is x years, then Ana would be (x-12) years old
Now, within 7 years Eva’s age is twice that of Ana
Mathematically, that means when we add 7 years to each of their ages, we have the result as in the statement above.
Thus;
x + 7 = 2(x -12+ 7)
x + 7 = 2(x-5)
x + 7 = 2x -10
2x-x= 10 + 7
x = 17 years
