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60 = 2(5x)
60 = 10x
6 = x
3(6)=18
2(6)=12
Luas
18x12
216 cm²
p = 3x
l = 2x
keliling persegi panjang = 2(p+l)
60 = 2 (p + l)
60 = 2 (3x+2x)
60 = 2 (5x)
60 = 10x
60:10= x
6 = x
maka diperoleh
panjang 3x = 3(6) = 18 cm
lebar 2x = 2(6) = 12 cm
Luas persegi
= p × l
=18 × 12
= 216 cm²