50.9k views
0 votes
This is solving systems of equations by elimination, though I am a bit confused ​

This is solving systems of equations by elimination, though I am a bit confused ​-example-1

1 Answer

7 votes

Answer:

x=7

y=-1

Explanation:

4x+8y=20

-4x+2y=-30

8y=20-4x

y=(20-4x)/8

substitute

-4x+2(20-4x)/8=-30

-4x+(40-8x)/8=-30

-4x+5-x=-30

-5x=-35

x=7

4(7)+8y=20

8y=-8

y=-1

User Roalt
by
8.7k 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