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P = 4L/3
P+4/L-7 = 2/1
P+4 = 2L - 14
P-2L = -18
4L/3 - 2L = -18
4L/3 - 6L/3 = -18
4L-6L = -54
-2L = -54
L = 27
P - 2L = -18
P- 54 = - I8
P = 36
KELILING PERSEGI PANJANG MULA MULA
2(P+L) = 2 (36 + 27)
= 2 (63)
= 126