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Lisa cut a rope that was 19.75 meters long into 3 pieces. The first piece of rope was 6.4 meters long, and the second piece of rope was 4.36 meters long. How long was the third piece of rope?

Sagot :

6.4+4.36+x=19.75
10.76+x=19.75
x=8.99m

The third piece was 8.99m long.