



 
Hi Demetrie, In these algebra problems you sometimes need to decide which quantity is to be the "unknown". I am going to use the length of one of the equal length sides to be the unknown. Let $L$ be the length of one of the two sides of equal length, in feet. Thus you have 2 sides of length $L$ feet each. The third side has a length $L + 4$ feet. What is the sum of the lengths of the three sides? This sum is the perimeter if 49 feet. Solve for $L$. Penny  


Math Central is supported by the University of Regina and the Imperial Oil Foundation. 