Question

Olivia added the linear equations - 4x +9y = 19

and 5x – 9y = - 17 together and got x = 2. She
then substituted the value of x back into one of
the equations and simplified to get y = 3. How many solutions are there to the system of
equations?
A.0
B.1
C.2
D.3

Answer 1

One.

Explanation:

Olivia's result was x = 2 and y = 3.

This means that the lines would intercept at (2, 3).

There is one solution to the system of equations.