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).

1. 8 or -82. 14 or -143. -11, -3, 0, 7, 10

Dbc if u do the math and stuff that what i got let me know if i was wrong