Question

For every dime spent, Davida receives 15 food pebbles to feed the animals in the petting zoo. Davida has fed the animals a total of 135 food pebbles. Write and solve an equation to find the number of dimes Davida spent T the petting zoo

Answer 1

It can basically be solved using a ratio/proportion:

1 dime :15 food pebbles = ? dimes :135 food pebbles

? can be found by:
135 / 15

Hope that helps!