Answer:
21+35p= 56p
Explanation:
First, you take the numbers 21 and 35 and then add them.
Second, you take the variable (p) that you removed from 35 and add it to the end of 56.
This is to be done because you may separate the variable in order to find the solution but once done you must add the variable back in its place or else you will get the wrong solution.