Question 159745
Piece 1=X

Piece 2=X+3

Piece 3=X+3+4

X+X+3+X+3+4=64

Combine like terms

3X+10=64

Subtract 10 from both sides

3X=54

Divide both sides by 3

X=18

Therefore Piece 1=18in
Piece 2=21in

Piece 3=25in

To confirm add the values of all three pieces

18+21+25=64