<span>2/3x + 3/7 = 1/2 Subtract 3/7 on both sides 1/2 - 3/7 Multiply until both fractions have the same common denominator 7/14 - 6/14 Subtract the numerators but NOT the denominators 2/3x= 1/14 Divide 2/3 on both sides 1/14 divided by 2/3 Flip the fraction 1/14 to 14/1 while changing the divided sign to multiplication. 14/1*2/3 Multiply </span>Final Answer: 28/3 or 9 1/3 *Both answers are equivalent to each other.
Each interior angle of the polygon is 108 degrees, so each exterior angle of the polygon is 180-108 = 72 degrees. So the number of sides is 360/72 = 5.
