Question

The first side of a triangle is twice the length of the second side; the third side is 20 feet less than three times the second side. The perimeter of the triangle is 106 feet. Find the three sides.

Answer 1

x=2nd side

2x=1st side

3x-20=3rd side

x+(2x)+(3x-20)=106

6x-20=106

6x-20+20=106+20

6x=126

6x/6=126/6

x=21

1st side=42 ft

2nd side-21 ft

3rd side=43 ft