Answer: (1/4 , 6)
Explanation:
we substitute y = 12x + 3 with 8x - 1/3y = 0 y's so
8x - 1/3(12x+3) = 0 now distribute -1/3 to (12x + 3)
8x - 4x - 1 = 0 add 1 on both sides and subtract 4x with 8x
4x = 1 divide 4 to isolate x
x = 1/4
input 1/4 into the x of y = 12x + 3
y = 12(1/4) + 3
y = 3 + 3 = 6
(x , y) -> (1/4,6)