Question

Use the Substitution Method to solve the following system of equations.
2x - 9y = 1
x - 4y = 1

(1, 5)

(-5, -1)

(5, 1)

(-5, 1)

Answer 1

you can arrange the x -4y = 1 as x = 4y +1

then substitute the x for 4y +1 on the first equation

Answer 2

is it A
?

Answer 3

lets try it A = (1,5)

2(1) - 9 (5) = 1
2 - 45 = 1
-43 = 1 not true can not be A

Answer 4

Its C. :)