Question

What is the solution to this system of equations?

2x + y = 40
x - 2y = 20
A: (12, 16)
B: (15, 17.5)
C: There is no solution.
D: There are an infinite number of solutions.

Answer 1

Explanation:

Use inverse operation to do -y on both sides. Infinite number of solutions means that it is equal to the same thing. For example, 5=5. An example for no solution is 4=8.