SOLUTION: If r=9 and 4r+3s=75, what is the value of s?

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Question 938106: If r=9 and 4r+3s=75, what is the value of s?
Found 2 solutions by ewatrrr, Stitch:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
If r=9 and 4r+3s=75
Plug and Play
...
36 + 3s = 75
3s = 39
s = 13

Answer by Stitch(470) About Me  (Show Source):
You can put this solution on YOUR website!
Given r = 9
4r+%2B+3s+=+75
Plug 9 into the equation for r
4%2A%289%29+%2B+3s+=+75
36+%2B+3s+=+75
Subtract 36 from both sides.
3s+=+39
Divide both sides by 3
highlight%28s+=+13%29