# algebra

posted by .

3r-5s=-14 3r+3s-56

• algebra -

subtract the second equation from the first...

3r-3r-5s-3s=-14+?56

I am not certain on your second equation, an equals is missing.

• algebra -

I tried and verified the equation with the following assumption to make it work.

3r - 5s = -14
3r +3s = 56

subtract the second equation from first equation:

You will get -8s = -70

s = 70/8

substitute s in any of the original problem equations to get the value of r.
3r = -14 + 5s

3r = -14 + 5 (70/8)
= (-112 + 350)/8
= 238/8
3r = 119/4

r = 119/12

To verify the values - apply the values to one of the equations to hold true.

3r -5s should be equal to -14

= 3 (119/12) - 5 (70/8)

= 119/4 - 350/8

= (238 - 350) / 8

= -112/8

= -14

So we are good!

So, your problem statement should be

3r + 3s = 56

Hope this clarifies!

## 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 2

Posted by hellogoodbie on Saturday, January 16, 2010 at 3:24pm. Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done?
7. ### 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 …
8. ### 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?
9. ### 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
10. ### 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)

More Similar Questions