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150 = 2((6x+3)+(4x-8))
150 = (12x+6)+(8x-16)
20x-10 = 150
20x = 160
x = 8
panjang = 6×8+3 = 51 cm
lebar = 4×8-8 = 24 cm
Keliling = 150
2 × (p + l) = 150
2 × (6x+3+4x-8)= 150
2 × (10x - 5) = 150
20x - 10 = 150
20x = 160
x = 160/20
x = 8
Cari panjang persegi panjang
panjang = 6x + 3
panjang = 6(8) + 3
panjang = 48 + 3
panjang = 51 cm
Cari lebar persegi panjang
lebar = 4x - 8
lebar = 4(8) - 8
lebar = 32 - 8
lebar = 24 cm
Panjang dan lebar persegi panjang tersebut adalah 51 cm dan 24 cm