Question

Nina is 10 years younger than Deepak. Deepak is 3 times as old as Nina. Which system of equations can be used to find d, Deepak's age, and n, Nina's age? d = n + 10 d = 3n d = n − 10 d = 3n d = n + 10 n = 3d d = n − 10 n = 3d

Answer 1

The answer is A. Deepak is 10 years older than Nina, so it cancels out B and D. And Deepak is 3 times Nina's age, not the other way around.

Explanation:

Answer 2

d = 3n
n = d - 10.....d = n + 10