word problems - Applications of linear equations.

Question

the length of each of the legs of an isosceles triangle is 5 times the length of the base. The perimeter of the triangle is 33cm. find the length of each side.

Answer 1

2(5b)+b = 33

11b =33

b= 33/11 = 3 cm = base length

other 2 sides are 5(3) = 15 cm each