# Algebra

posted by .

9X+y=2
-4X-y=17

• Algebra -

use elimination method to solve it.

• Algebra -

9 x + y = 2
-4 x- y = 17 Add
______________

9 x + ( - 4x ) + y + ( - y ) = 2 + 17

9 x - 4 x + y - y = 2 + 17

5 x + 0 = 19

5 x = 19 Divide both sides by 5

x = 19 / 5 = 3.8

9 x + y = 2

9 * 19 / 5 + y = 2

171 / 5 + y = 2

y = 2 - 171 / 5

y = 10 / 5 - 171 / 5

y = - 161 / 5

y = - 32.2

## Similar Questions

1. ### SHAY

THE MATH QUESTION IS IT ALGEBRA , PRE ALGEBRA' OR GEOMETRY?
2. ### Algebra I

So- im trying to help my little brother out with his Algebra- but its been awhile since i have had algebra class- we need help with the following question: Solve the following equation for x: 2(x+4)=4x+12 2x+8=4x+12 2x=-4 x=-2 I think, …
3. ### Algebra

I am getting ready to start an Algebra class for the first time and I was wondering what challenges people have with learning and using algebra concepts. Also what are the best ways to over come math anxiety?

There are at least 5 more than twice as many students taking algebra 1 than taking algebra 2. If there are 44 students taking algebra 2, what is the least number of students who could be taking algebra 1. Show all work
5. ### Algebra 1A

How is algebra a useful tool? what concepts investigated in algebra can be apply to personal and professional life?
6. ### Algebra-still need some help

Homework Help Forum: Algebra Posted by Jena on Thursday, February 3, 2011 at 7:32pm. Find the domain of the function. f(x)=(sqrt x+6)/(-2x-5) Write your answer as an interval or union of intervals. Algebra - David, Thursday, February …
7. ### algebra 1

at a certain high school,350 students are taking algebra. the ratio of boys to girls taking algebra is 33:37. How many more girls are taking algebra than boys?
8. ### algebra

Is there a site or someone who can help me, im not getting the basic algebra...I need someone or a web site that will help me understand the basics of algebra. PLZ HELP Im in 8th grade
9. ### Algebra

y^2-x-4=0 a)find all x and y intercepts of the graph implied by this equation. (use an appropriate equation). b) test the graph for symmetry using algebra. (explain reasoning through algebra)
10. ### MATH

Lesson 9: Foundations for Algebra Unit Test CE 2015 Algebra 1 Unit 2: Foundations for Algebra SOMEONE, PLEASE GIVE ME THE ANSWERS 1-30

More Similar Questions