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96 = 4X + 12 + 2X + 6
96 = 4X + 2X + 6 + 12
96 = 6X + 18
6X = 96-18
6X = 78
X = 78 : 6
X = 13
luas Persegi panjang = PxL
(2X + 6 ) x( X + 3)
2x13 +6 x 13+3
26 + 6 x 13+3
32 x 16
512
maaf klo salah
keliling= panjang+lebar+panjang+lebar
keliling= panjang+panjang+lebar+ lebar
keliling= 2panjang+2lebar
96=2(2x+6)+2(x+3)
96=4x+12+2x+6
96=4x+2x+12+6
96=6x+18...............pindah ruas
96-18=6x
78=6x
6x=78
x=78/6
x=13
panjang= 2x+6
panjang= 2(13)+6
panjang= 26+6
panjang= 32
lebar= x+3
lebar= 13+3
lebar= 16
luas= panjang*lebar
luas= 32*16
luas= 512cm²