
that is the answer to the equation of your question
Line1: y = -x + 2
Line2: y = 2x - 1
Solution: (1,1)
If you just mean the product of the prime factors of 39 then this is the answer
39 = 3 x 13
Since 4 is between 2 & 5 you input it into the middle equation.
x=4
so the answer is 4!