Question

Solve the following system of equations. Please show your work to receive full credit.
x - y = 13
2x + y = 2

Part 2:
Explain which method you chose to solve the system and why you felt it was the best choice.

Answer 1

use addition or elimination and add the two equations together
you will get:
3x=15 then divide by 3 to get that x=5
plug in x=5 into the first equation to get:
5-y=13 and solve for y
-y=8 so y=-8
check answer using the second equation:
2(5)+ (-8) = 2
10-8=2, 2=2 check
so the answer is (5, -8)