Does anyone know what this answer is

8x-2y=-6

-20x+5y=15

X=(-6+2y)/8

-20((-6+2y)/8)+5y=15

(120-40y)/8+5y=15

15-20y+5y=15

-15y=0

y=0

X=(-6+2 x 0)/8

X=-½

step-by-step explanation:

(s)he  is right it would be 5.5% because it is smaller than 15.5% or anything smaller than 15.5% in general