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Dit:
a. K dlm bentuk x?
b. Jika K= 36, maka p dan l?
Penyelesaian:
a. K= 2p + 2l
= 2(3x+2) + 2(2x-3)
= 6x+4+4x-6
= 10x - 2
b. K=10x-2
36=10x-2
36+2=10x
38=10x
x=38/10
= 19/5
P= (3x+2)
= 3(19/5) +2
= 57/5+10/5
= 67/5
l= (2x-3)
= 2(19/5) -3
= 38/5 - 15/5
= 23/5