Question 8096
Perimeter of a Triangle is P=2(L+w)

Length = x
Width = x+15

Equation is {{{190=2(x+x+15)}}}
{{{190=2(2x+15)}}}
{{{190=4x+30}}}
{{{160=4x}}}
{{{40=x}}}

Length = 40
Width = 40+15=55
Perimeter = 2(40+55)= 190

I hope that helps you
CharStar