73.5k views
16 votes
Solve using elimination.
9x + 2y = -5
-9x + y = 11

User Greg Ward
by
8.4k points

1 Answer

5 votes

Answer:

(-1, 2)

Explanation:

9x+2y=-5

-9x+y=11

If you notice that these two equations can be easily worked out with since 9x (from the first equation) and -9x (from the second equation) can be easily eliminated. So, you will start adding the left numbers/variables from the two equations.

9x+2y=-5

-9x+y=11

2y+y=3y (every variable has a secret/hidden 1)

-5+11=6

3y=6

(divide 6 by 3)

y=2

Replace the value of y into ANY of the equations from the question. (I would be using the second one)

-9x + y = 11

-9x+2=11

(now just do simple algebra)

-9x=9

x=-1

User Gordon Yorke
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories