Two sides of a triangle are 6 m and 7 m. the perimeter of the triangle is 23 m. what's the third side?

Since there are 3 sides of a triangle, and you already have two sides, just subtract the sun of the two sides from the total. You have 6 and 7 meters. Combine those into 13, then subtract if from 23. You get 10 meters. So, the mystery side would be 10m.

than do 23.50 times 18 and then divide your answer by 100 than you will get x.