the lengths of the sides of a triangle are x, x - 5, 3x centimeters. if the perimeter is 80 centimeters, what is the value for x?

x= 17cm

Step-by-step explanation:

given:

sides of a triangle:

x, x-5, 3x

perimeter= 80cm

perimeter of a triangle= side + side + side

80 = x + (x-5) + (3x)

80 = x + x + 3x -5 >(rearranging the like terms together)

80 = 5x - 5

80+5 = 5x

85 = 5x

85/5 = x

17cm = x

child does not get an education so she can use the molla on junk

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x