garcia has 1 more than four times the number of marbles than quincy has. the difference in the amount of marbles is 19

Okay so we probably have to find the amount of marbles grace OR quincy has (you didnt say specifically)

Step-by-step explanation:

Lets say the amount of marbles quincy has is x. Grace has 1 more than four times x, which looks like this:

4x + 1

Then they state that the difference in the amount of marbles they have is 19. So now it looks like this:

4x + 1 + 19 (We do plus 19 because if the difference in marbles is 19, that means grace has 19 MORE than quincy

Now we have completed the equation. All we have to do is solve:

4x + 1 + 19

4x = 20

4x / 4 = 20 / 4

x = 5

Now to re - check our solution to see make sure its correct, we substitute it back into the original equation:

x = 5

4 (5) + 1 + 19 =

40

So garcia has 21 marbles, and quincy has 5.