Question

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

Answer 1

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).