Question

.The first side of a triangle is twice as long as the second side and the third side is 5 more than the first side. If the perimeter of the triangle is 65 cm. Which of the following is the smallest side?

Answer 1

let the 2nd side be x
then the first side is 2x
and the third side is 2x+5
( I just translated all the English into Math)

Perimeter is the sum of all the sides, so
x + 2x + 2x+5 = 65
5x = 60
x = 12

sides are 24, 12, 29