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2(3x+7)=74
6x+14=74
6x=60
x=60/6=10
Panjang=2.10+5=25
Lebar=10+2=12
Selisih=25-12=13
74 = 2 ( 2x + 5 + x + 2 )
74 = 2 ( 3x + 7 )
74 = 6x + 14
6x = 74 - 14
6x = 60
x = 10
Maka;
p = 2x + 5 = 2 x 10 + 5 = 25 cm
l = x + 2 = 10 + 2 = 12 cm
Jadi, selisih panjang dan lebarnya = 25 - 12 = 13 cm