Question 1054561
let g = the age of the gold coins
let s = the age of the silver
:
Write an equation for each statement
:
The sum of the ages of a gold coin and a silver coin is 115 years.
g + s = 115
 The age of the gold coin 15 years from now will be 10 years less than the age of the silver coin 10 years ago.
g + 15 = s - 10 - 10
g = s - 20 - 15
g = s - 35
:
in the 1st equation, replace g with (s-35)
(s-35) + s = 115
2s = 115 + 35
s = 150/2
s = 75 yrs old is the silver coin
then
g = 75 - 35
g = 40 yrs old is the gold coin
:
;
Check 40 + 75 = 115




 Find the present ages of the two coins.