Question 263426
This is a mixture problem. Here is a table based on the given information
fat . . . . . . .% . . . . . . pounds . . . . . . . . %-pounds
29. . . . . . . 29 . . . . . . . .p . . . . . . . . . . .29p
15 . . . . . . .15 . . . . . . . .63-p. . . . . . . . .945  -15p
17 . . . . . . .17 . . . . . . . .63. . . . . . . . . . .1071
set the third column equal to get
{{{29p + 945 - 15p = 1071}}}
combine like terms to get
{{{14p + 945 = 1071}}}
subtract 945 to get
 {{{14p = 126}}}
p = 9 pounds @ 29 %
63-p = 54 pounds @ 15%