Homework Help: math problem

Posted by DJ on Saturday, January 21, 2012 at 8:34pm.

very confused could someone help me with this

using the elimination method

5r-3s=16
3r+5s=30

math problem - yuuka, Saturday, January 21, 2012 at 11:21pm
Let's say we want to eliminate 's'
So multiply 5 to the first equation
and multiply 3 to the second equation
we get:
25r - 15s = 80
9r + 15s = 90

use the elimination method by adding those two equation -15s and 15s cancels out
we get:
34r = 170

Then r = 5
math problem - Anonymous, Wednesday, April 18, 2012 at 1:15pm
2c+3d+7-5c

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