Question

He is 15 years old this is 6 years younger than his sister Victoria write and solve a subtraction equation to find Victorious age

Answer 1

15+6=21
Victoria's age=21

Answer 2

First you Add 15+6. That equals 21. Afterwards you Subtract: 21-6 which equals = 15
$15 + 6 = 21$
$21 - 6 = 15$

And that is how you calculate it. Simple