Question

Henry's current age is 10 times Justin's current age. In 6 years Henry's age will be 4 times Justin's age. Which system of equations can be used to calculate H, Henry's current age, and J, Justin's current age?
A. J = 10H
J +6=4(H+6)

B. J = H+6
J+4=H+10

C. H = 10J
H+6=4(J+6)

D. 10J
H+4=6(J+4)

Please explain too.

Answer 1

The answer is C: H=10J
                             H+6=4(J+6)