an equilateral triangle has a premimeter of 3x + 30. what is the length of each side of the triangle?
2 answers:
Since an equilateral triangle has three equal sides you need to divide the perimeter by 3 to get 3 equal lengths. First - set it up as division and get: (3x+30)/3 Second - to divide by three you need to factor out 3x+30 and you will get: 3(x+10)/3 Third - you have to divide the two 3'sand get: 1(x+10)/1 = x+10 ANSWER: X+10 And if you wanted to check you could add x+10+x+10+x+10 Combine like terms and you'll get back to the perimeter of 3x+30
3x + 30 divided by each of the 3 sides would equal x+10. Because 3(x+10) = 3x+10
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