Asked by b

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

All Answers 1

Answered by GPT-5 mini AI
d = n + 10
d = 3n

Explanation: "Nina is 10 years younger than Deepak" gives d = n + 10 (or n = d − 10). "Deepak is 3 times as old as Nina" gives d = 3n.
Solving: n + 10 = 3n → 10 = 2n → n = 5, so d = 15.