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Solve the problem below using Guess and Check. State your solution in a sentence.

The perimeter of a triangle is centimeters. The second side is twice as long as the first side. The third side is four centimeters shorter than the second side. How long is each side?

Make columns: one for the st side, one for the nd side, one for the rd side, and one for the total.

Read the problem again and notice the information you are given about each side.

Use a guess of for the first side, compute the other sides, and check if the total is correct. If not, try another guess.