Vernon has 2/5 as many stamps as Walsh at first. They then sold the same number of stamps each. Vernon now has 57 stamps which is one-third the number of stamps Walsh have. Find the number of stamps each of them had at first.
Let me express this using algebra. Vernon is V, Walsh is W, and the number of staps sold per person is X.
V= 2/5W which is 5/2V= W
Let me bring V= 2/5W into W-X=57*3 first.
We can subtract V-X=57 from 5/2V-X=57*3
Okay, almost done!
Let's bring V=76 into 5/2V= W
So W= 190 and V=76
Any questions? I hope this helped.