SOLUTION: P = 60 in. Find the length of each side. 7y, 2y+1, 3y+5

Algebra ->  Triangles -> SOLUTION: P = 60 in. Find the length of each side. 7y, 2y+1, 3y+5      Log On


   

Question 79660This question is from textbook geometry reasoning
: P = 60 in. Find the length of each side.
7y, 2y+1, 3y+5 This question is from textbook geometry reasoning

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Since the perimeter is the sum of all sides we can say:

60=7y%2B2y%2B1%2B3y%2B5

60=12y%2B6 Combine like terms

54=12y%2B6

54%2F12=cross%2812%2F12%29y

y=9%2F2
So y is nine halves or 4.5
Check:
60=7%284.5%29%2B2%284.5%29%2B1%2B3%284.5%29%2B5 Plug in y=4.5
60=31.5%2B9%2B1%2B13.5%2B5
60=60 works