Persegi panjang=(3x-1) L=(x+5)cm kelilingnya 1m tentukan nilai x,panjang,Lebar,luas

1m = 100cm

kll = 100
2 (P + L) = 100
[tex]2 [(3x -1) + (x + 5)] = 100 \\ 2(4x + 4) = 100 \\ 8x + 8 = 100 \\ 8x = 100 - 8 \\ x = \frac{92}{8} \\ x = 11.5
nilai

#Panjang (3x - 1)
(3 (11.5) - 1) = 33.5 <<== Panjang

#Lebar (x + 5)
(11.5 + 5) = 16.5 <<=== Lebar

# Luas = P x L

LUAS = 33.5 x 16.5
= 552.75 cm^2