Lots of equations that equal 420? Anybody know some?

If we do it algebraically, we get

x + y = 420

This is the simplest equation. You see now this is a linear pair in two variables. Thus, there will be infinitely many solutions.

E. g - 419 + 1 = 420

42 * 10 = 420

21 * 20 = 420

etc, ...

42 times 10

210 times 2

210 + 210

70 times 6

60 tmes 7

140 times 3

and etc