Question

Use elimination to find the solution to the system of equations.
5x + y = 10
2x - 2y = 4


A. (-2, 20)


B. (2, 0)


C. (9, 7)


D. (0, 2)

Answer 1

multiply the first equation by 2 to give

10x + 2y = 20

2x - 2y = 4   Adding to elininate y

12 x = 24
x = 2

Plug x = 2 into 2x - 2y = 4

4 - 2y = 4
y = 0

so the answer is 

(2,0)