Answer:
Robert's uncle needs 350 acres of pumpkins.
Explanation:
Let's denote the number of acres of squash as
and the number of acres of pumpkins as
.
The problem states that the uncle wants to plant 190 more acres of pumpkins than acres of squash. This can be expressed as an equation:

The total number of acres on the farm is 510 acres, so the sum of the acres of squash and pumpkins must equal 510:

Now, substitute the expression for
from the first equation into the second equation:

Combine like terms:

Subtract 190 from both sides:


Divide by 2:


Now that we know the number of acres of squash (
), we can find the number of acres of pumpkins using the first equation:



Therefore, Robert's uncle needs to plant 350 acres of pumpkins.