Register
ELIMINATION!! How do you work out 4x+7y= -80 and 3x+5y= -58
59.1k views
5 votes
ELIMINATION!! How do you work out 4x+7y= -80 and 3x+5y= -58

ELIMINATION!! How do you work out 4x+7y= -80 and 3x+5y= -58-example-1
User Sabino
by
5.6k points

2 Answers

3 votes
Oh, I love elimination <3 Would you like to eliminate x or y?
User LeeNeverGup
by
5.9k points
4 votes
3(4x+7y=-80)
-4(3x+5y=-58)

12x+21y=-240
-12x-20y=232
the x's cancel out and you're left with
y=8
then you plug in y and get
4x+7(8)=-80
4x+28=-80
4x=-108
x=27
User Vitaliy Isikov
by
5.5k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

6.5m questions

8.7m answers

Other Questions

What is the least common denominator of the four fractions 20 7/10 20 3/4 18 9/10 20 18/25
What is 0.12 expressed as a fraction in simplest form
Solve using square root or factoring method plz help!!!!.....must click on pic to see the whole problem
What is the initial value and what does it represent? $4, the cost per item $4, the cost of the catalog $6, the cost per item $6, the cost of the catalog?
What is the measure of xyz
Link Copied!