Question

PLEASE HELP i need help w/ other questions too... The sum of Grover's age and that of his friend's Harold is 180 years. Thirty years ago, Grover was 3 times as old as Harold was then. How old are Grover and Harold?

Answer 1

The sum (the addition of) G and H is 180
so:
G+H=180

30 years ago G's age was (G-30) and H's age was (H-30).
so if Grover was three times H's age 30 years ago
3(G-30)=(H-30)

Answer 2

So your 2 equations with 2 unknowns are:
G+H=180
3G-90 = H-30

I'd solve for H in the second equation and then substitute into the first.

Answer 3

G+H=180
3G-90 = H-30 ---> 3G-90+30 = H --> 3G-60 = H
G + H=180 --> G+ (3G-60) = 180 --> 4G -60 =180 --> 4G=240 -->G=60
G=60, plug into one of the 2 equations to get H

Answer 4

g=60
h=120

Answer 5

"Grover was 3 times as old as Harold"
Adjust a little tiny bit: G = 120 yr old , H =60 yr old

Answer 6

ohh. what if i had written that he was 60 years old on a test. do you think i'd gotten it wrong?

Answer 7

oh yeah thanks :D