Question

Solve the system using elimination.

3x + 3y = –9
3x – 3y = 21
A. (3, –6)
B. (–5, 2)
C. (3, 3)
D. (2, –5)

Answer 1

You need to add up the two equations.

Answer 2

And you'll get \[6x=12\]

Answer 3

So x = 2

Answer 4

Then substitute the value you found on any of the equations:\[3(2)+3y=-9\]

Answer 5

Solving for y

Answer 6

y=-5