Let x represent the number of dimes Ed has in its collection.
The total of coins in the collection is 8 more than three times the number of dimes.
The number of coins is 92.
3 times the number of dimes can be symbolized as: 3x
"8 more" is symbolized as +8
So the total number of coins equals:
92=3x+8
From this expression you can determine the number of dimes by solving the equation for x:
x=28 → Ed has 28 dimes in his collection.