Question

By showing all steps, solve for x if the perimeter of a triangle is 26. Side A: 14-2x
Side B:3x-1
Side C: 2x+1
(I'll medal and fan)

Answer 1

well you know

Perimeter = sum of the 3 sides

so

26 = 14 - 2x + 3x -1 + 2x + 1

collecting like terms and you get

26 = 3x + 14

all you need to do now is solve for x

hope it helps

Answer 2

I'm lost, how did you get 26=3x+14?

Answer 3

well I collected the like terms when I added the 3 sides

so looking at the x's

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

now the whole numbers

14 - 1 + 1 = 14

so the sum of the 3 sides of the perimeter is

3x + 14

and you are told it equals 26

so thats how you get the equation

26 = 3x + 14

Answer 4

That helped me so much, thank you!