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8X+6+6X-2=74
4+14X= 74
14X= 70
X= 70/14
X= 5
pnjg = 4.5+3 = 23
lebar = 3.5-1 +14
74 =2 {(4x+3) + (3x-1)}
74=2 (7x+2)
74=14x+4
74-4=14x
70 :14=x
6 = x
panjang: 4x+3
4x6+3
27
lebar: 3x-1
3x6-1
17