Susie and frank are comparing their math grades from their report cards. Susies grade minus franks grade is 22. The sum of their grades is 168. What are their grades

Question

Idk I’m so confused

Answer 1

Let's assume susie grade represents S and Frankie Grdaes as F.

so the given equations would be as follows

S-F=22

S=F=168

Adding these two together we get

2S=190

S=95

therfore F=73

Answer 2

2 unknowns requires 2 equations:

s + f = 168

s - f = 22, s = f + 22

f + 22 + f = 168

2f = 146

f = 73

s = 95