SOLUTION: two sides of an equilateral triangle have lenghts 3x + 1 and -2x+26. which of 21-x or 3x-4 could be the lenght of the third sid
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Question 479556: two sides of an equilateral triangle have lenghts 3x + 1 and -2x+26. which of 21-x or 3x-4 could be the lenght of the third sid
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
21 - x.
To see this, solve for 3x + 1 = -2x + 26.
==> 5x = 25, or x = 5. ==> the length of a side is 3*5 + 1 = 16.
since while 21 - 5 = 16, the answer is 21 - x.
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