107k views
0 votes
Find a solution to the system of equations by elimination
12x-9y=-15
-4x-8y=-28

User Zaki Aziz
by
7.8k points

1 Answer

2 votes

12x - 9y = -15

Let's divide both sides by 3.

4x - 3y = -5

The other equation is

-4x - 8y = -28

Adding equations,

-11y = -33

y = 3

4x = 3y - 5 = 3(3) - 5 = 4

x = 1

Answer: x=1, y=3

Check:

12(1)-9(3)=-15, good

-4(1) - 8(3) = -28, good

User Mmell
by
8.2k 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