Question

1.) 2x + y = 3

2.) x - 2y = -1
If equation 1 is multiplied by 2 and then the equations are added, the result is

A.3x = 2
B.3x = 5
C.5x = 5

Answer 1

Answer: C is correct, 5x=5

Explanation:

1. When equation 1 is multiplied by 2 it becomes 4x+2y=6

2. Now we have...

4x+2y=6 and x - 2y = -1

Add those together and you have your answer! 5x=5 (simplified is x=1)