Question

5x - 2y = 15

2x + 4y = 12

Select the solution to the system from the options below:

Answer 1

x = 7/2 and y = 5/4

Explanation:

2(5x - 2y = 15)

2x + 4y = 12

10x - 4y = 30

2x + 4y = 12 (add)

-----------------

12x = 42

x =
`(42)/(12)` =
`(7)/(2)`

2x + 4y = 12 (subsitute)

2(
`(7)/(2)`) + 4y = 12

7 + 4y = 12

4y = 5

y =
`(5)/(4)`

Answer 2

7/2, 5/4

Explanation: