SOLUTION: Two sides of a triangle have the same length. The third side measures 4 m less than twice that length. The perimeter of the traiangle is 24 m. Find the lengths of the 3 sides.

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Let x be the length of each equal side and then 2x - 4 is the length of the base.
p = a + b + c
24 = a + b + c

step 1 - combine like terms to get

step 2 - add 4 to get

step 3 - divide by 4 to get

the three sides are
{7, 7, 10}