SOLUTION: c+11 over 21 equals 4 over 7

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Question 776841: c+11 over 21 equals 4 over 7
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
%28c%2B11%29%2F21=4%2F7 <--- m by 7
%28c%2B11%29%2F3=4 <--- now by 3
c%2B11=12
c=1