Given the system of equations what is the solution?
x + 3y = 5
x - 3y = -1

answer choices
-4, -3
2, 1
-2, 3

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

the answer is d. (1.2, -4.7) on edgn

hope this !