Solve the system of equations. Show ALL your work. Put your answer in the form of an ordered pair (x, y)

-4x + 11y = 15

x = 2y

This should be easy because we just have to use substitution method. Substitute the value of x from the second equation into the x of the first equation.

-4 (2y) + 11y = 15

-8y + 11y = 15

3y = 15; y = 5

Substitute this value of y to either the first or second equation.

x = 2 (5) = 10

The ordered pair is therefore (10,5).