What is the formula for this question?

Answer: (3,-2) as the solution, formulas given in question
Step-by-step explanation:
the formulas are y = x/3 - 3 and y = -x + 1
set these equal to each other to get
x/3 - 3 = -x + 1
4x/3 = 4
x = 3
so you get y = x/3 - 3 = 3/3 - 3 = -2
so the solution is (3,-2)