Question

The perimeter of a triangle is 53 meters. Side a is three less than side b and side c is twice side b.

Answer 1

a = 11

b = 14

c = 28

Explanation:

a+b+c = 53

b-3 = a

c = 2b

substitute for a and c

(b-3)+b+(2b) = 53

reduce

4b-3 = 53

add 3 to each side

4b = 56

divide both sides by 4

b = 14

a = 14-2 = 11

c = 2(14) = 28