<PRE><B>Question 954432</B>
a, b, and c are sides of a triangle;P=perimeter=a+b+c=13 in
b=2a
c=a+1in
a+b+c=13in Substitute for b and c.
a+2a+a+1in=13n
4a+1in=13in Subtract 1 in from each side.
4a=12in Divide each side by 4.
a=3in ANSWER 1: Side a is 3 inches.
b=2a=2(3in)=6in ANSWER 2: Side b is 6 inches.
c=a+1in=3+1in=4inANSWER 3: Side c is 4 inches
CHECK:
P=a+b+c
13in=3in+6in+4in
13in=13in</PRE>