Question

A triangular region has a perimeter of 66 meters. The first side is two-thirds of the second side. The third side is 14 meters shorter than the second side. What are the lengths of the three sides of the triangular region?

Answer 1

let second side = x meter, first side = 2x/3 meter
and third side = x-14

sum of all sides i.e perimeter x +2x/3 + x-14 = 66
=> 2x+2x/3 =80
=>8x/3 =80
=> x = 30
so, first side = 20 meters,
second side = 30 meters
third side = 16 meters

Answer 2

How did you get the 80?

Answer 3

66+14 = 80

Answer 4

How do you eliminate the fraction? 2/3x I thought you should multiply both sides of the equation by the least common denominator. Thanks for the explanation.

Answer 5

\[x + \frac{2}{3}x + (x-14) = 66\]
You can add the like terms, so you get\[x + \frac{2}{3}x + x = \frac{3}{3}x + \frac{2}{3}x + \frac{3}{3}x = \frac{3+2+3}{3}x = \frac{8}{3}x\]

Answer 6

\[\frac{8}{3}x - 14 = 66 \ \ , \frac{8}{3}x = 80 \ \ , 8x = 240 \ \ , x = 30\]
Then solve for the other two sides.