SOLUTION: A number is 3 more than twice another. Find them if their sum is 36

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Question 300810: A number is 3 more than twice another. Find them if their sum is 36
Answer by Stitch(470) About Me  (Show Source):
You can put this solution on YOUR website!
Set-Up:
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Equation 1: A+=+3+%2B+2B
Equation 2: A+%2B+B+=+36
Soulution:
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Plug (3 + 2B) into equation 2 for A
Equation 2: A+%2B+B+=+36
%283+%2B+2B%29+%2B+B+=+36 Simplify
3+%2B+3B+=+36 Subtract 3 from both sides
3B+=+33 Divide both sides by 3
highlight_green%28B+=+11%29
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Now plug 11 into equation 1 for B
Equation 1: A+=+3+%2B+2B
A+=+3+%2B+2%2A%2811%29 Simplify
A+=+3+%2B+22 Simplify
highlight%28A+=+25%29