



 
Hi, You are looking for a number that I am going to call n. Now look at the sentence
7 less than the number is n  7 so I can rewrite the sentence
Twice the number is 2n thus
n  7 is subtracted from 2n is 2n  (n  7) so
Hence the equation to solve is
Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 