Answer:
Smaller donations each cost $20
The bigger donation is $15 more than the smaller ones.
Step-by-step explanation:
Let 4x be defined as the amount of the smaller donation, and let 7x be defined as the larger amount of the donation. We can then set up an equation:
4x+4x+7x = 75
15x = 75
x = 5
We can now plugin 5 for x to solve for the smaller donation and the larger donation:
Smaller donation = 4*5 = 20
Bigger donation = 7*5 = 35
Now, to find how much greater the bigger donation is, we just subtract 35 from 20, which is 15.
I hope this helped.