a=x+23
b=x
c=3x
P=108
x+23+x+3x=108
5x+23=108
5x=108-23
5x=85
x=85/5
x=17
a=17+23=40cm
b=17cm
c=17×3=51cm
a=x+23
b=x
c=3x
P=108
x+23+x+3x=108
5x+23=108
5x=108-23
5x=85
x=85/5
x=17
a=17+23=40cm
b=17cm
c=17×3=51cm