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AC=BD
3x +6 = 24 -x
3x+x = 24 - 6
2x=18
x=18/2 = 9
AC= 3x+6=3.9 + 6 = 27+6 = 33
BD = 24-x= 24 - 9 = 15
5. p:l = 7:3
k= 80
p= 7x
l= 3x
K = 2(p+l)
80 = 2(7x+3x)
80 = 2.10x
80 = 20 x
x= 80/20 =4
p= 7x= 7.4 = 28
l= 3x= 3.4 = 12
L = p.l = 28 . 12=336