Question

a drinking straw of length 21 cm is cut into 3 pieces. the first length is x cm. the second piece is 3 cm shorter than the first piece. the third piece is twice as long as the first piece. state in terms of x the length of each of the pieces.
x + (x-3) +2x = 21
4x = 24

Solve for x and then compute the length of the other two peces from the information you have already been given.
21

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