For this case we have the following system of equations:
x - 4y = 1
x + 2y = 19
Using the elimination method we have:
-4y - 2y = 1 - 19
-6y = -18
y = -18 / -6
y = 3
Then, by clearing x from any equation we have:
x + 2y = 19
x = 19 - 2y
x = 19 - 2 (3)
x = 19 - 6
x = 13
The solution is given by:
(x, y) = (13, 3)
Answer:
x = 13
option c.
