If (x, y) is a solution to the system of equations, what is the value of y?

if (x, y) is a solution to the system of equations, what is the value of y?

x + 1/8y = 20
x+1/4y=4

a. 48
b. -48
c. 128
d. -128

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

c. 1,233 miles