first piece : x
second piece : x+6
third piece : (x+6)+9 = x+15
x + x+6 + x+15 = 96
3x = 75
x = 25
F = length of FIRST piece.
S = length of SECOND piece.
T = length of THIRD piece.
F + S + T = 96
In addition we know,
S = F+6
T = S+9 which = F+6 + 9.
Substitute into F + S + T = 96
F + F+6 + F + 6 + 9.
Solve for F, then S, then T.
The answers are the same as yours by trial and error.
Thank You so much. It looks so simple, and makes sense the way you wrote it out!
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