100 acres of land was purchases to be split into 3 parcels. One parcel of land will be 3 times as large as the other two parcels. How many acres of land will each parcel contain? And how would this be put into an equation?

There is only one unknown, X, because all 3 parcels compare to each other, right?
2 are alike.
The third is 3 times each of the other 2.
100 is what all 3 add up to.
So how would you write this?
If X is a small parcel, and the second one is the same, X, then what is the third parcel?
How do you show all 3 totaling 100?

one parcel of land60, and other two is 20, 20

One parcel of land is 3 times as larger then other two so:- 20 multiplied by 3=60
60+20+20=100

you put it in a proper equation!

Lets consider 3 parcels as X,Y,Z
As said in the question Y=Z
X=3Y=3Z
X+Y+Z=100
3Y+Y+Y=100
5Y=100 => Y=20 then Z=20
and X=3Y=60

So the 3 parts are 60,20,20