A triangle has sides of length (x+5)cm, (2x -1) cm and (3x+7) cm. How do you find the value of x given the perimeter of the triangle is 29cm?
We get the perimeter of the triangle by adding up the length of all the sides:
So the lengths would be:
# x+5 = 8#
# 2x-1 = 5#
# 3x +7 = 16#