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September 19, 2014

September 19, 2014

Posted by **DEBBIE** on Wednesday, April 28, 2010 at 4:13am.

3(3+r)= 2r+4

so 3x3=9,3xr=3r = 2r+4

9+3r=2r+4

9-9+4=3r+2r ?????

- AALGEBRA -
**Reiny**, Wednesday, April 28, 2010 at 8:40amfirst one:

3h/2 = 30

multiply both sides by 2

3h = 60

divide both sides by 3

h = 20

second one:

3(3+r)= 2r+4

expand

9 + 3r = 2r + 4

3r - 2r = 4 - 9

r = -5

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