SOLUTION: the sides of a triangle are x cm, x+2 cm and x+5 cm . if the perimeterof the triangle is 19 cm, what is the value of x?

Algebra ->  Rectangles -> SOLUTION: the sides of a triangle are x cm, x+2 cm and x+5 cm . if the perimeterof the triangle is 19 cm, what is the value of x?      Log On


   

Question 496182: the sides of a triangle are x cm, x+2 cm and x+5 cm . if the perimeterof the triangle is 19 cm, what is the value of x?
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
Let's write this as x+x+2+x+5=19 cm
Combine like terms to get:
3x+7=19
Subtract 7 and divide by 3 to get:
x=4
Make sense?
RJ
www.math-unlock.com