Wednesday

September 17, 2014

September 17, 2014

Posted by **Elizabeth** on Monday, February 18, 2008 at 4:46pm.

I get the main idea, but i just don't know how to write it out.

Thanks!!

- Algebra 1 -
**Damon**, Monday, February 18, 2008 at 5:07pmP + R = 89

R + S = 80

P + S = 85

Now let's subtract equation 3 from equation 2

R - P = -5

now add that ot equation 1

P + R = 89

R - P = -5

------------

2 R = 84

so

R = 42

Now I will leave it to you to work your way back up and find P and S

- Algebra 1 -
**Elizabeth**, Monday, February 18, 2008 at 6:47pmin the first step, what happened to the S? I understand how you got -5, but I don't understand what happened to S. i understand everything else, just that.

would S = -5?

- Algebra 1 -

**Answer this Question**

**Related Questions**

Math - PAULA ,SIMON AND RANDY COLLECTED INSECTS FOR THEIR SCIENCE PROJECT. AT ...

Math - PAULA ,SIMON AND RANDY COLLECTED INSECTS FOR THEIR SCIENCE PROJECT. AT ...

English/Grammer - Having trouble finding the simple predicates in the follwing ...

MATH - A population of insects increases at a rate of 250 + 16t +0.3t^2 insects ...

Science - Hi I need help finding something. I need 6 primary articles about ...

biology - List of insects and their scientific names. There are over one million...

Social Studies - I need to write an article on Patty Hearst. What is a good ...

Psychology - Patty goes to a pizza buffet, afterwards she comes down with a ...

Math - Here is the question: Patty has a bag of 72 marbles. The ratio of green ...

science - a scientist is studying a new chemical hopes will prevent insects ...