Question 797187
Antonio has 5 times as much money as Eric. 
Eric has x
Antonio has 5x
If Antonio gives 640 to Eric, they will have the same amount of money.
5x - 640 = x + 640
Collect like terms:
5x - x = 640 + 640
4x = 1280
x = 320.
At start:
Eric had 320
Antonio had 1600.
Hope this helps.
:-)