Question

Using elimination to solve the system 2x + y = 8 and x + y = 4, which of the following could be the first step?
Answer

2x + y = 8--------> 2x + y = 8
(x + y = 4)(-1)---> -x - y = -4

2x + (4 - x) = 8

2x + y = x + y

3x + 2y = 12

x = 4

Answer 1

how do you know?

Answer 2

if i get this question wrong on my homework im blaming you!

Answer 3

lmao!