Question

Find the solution to the system 9x−4y=−13 and 9x−2y=−20

Answer 1

x = -3, y = -3.5. As an ordered pair it is (-3, -3.5).

Explanation:

9x − 4y = −13

9x − 2y = -20

Subtract:-

-2y = 7

y = -3.5.

Substitute for y in the first equation:

9x - 4(-3.5) = -13

9x = -27

x = -3.