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p=5x+2
l=2x+3
k=2(p+l)=94
ditanya: p dan l
jwb:
k=2(p+l)
94=2(5x+2+2x+3)
94=2(7x+5)
94=14x+10
94-10=14x
84=14x
84/14=x
6=x
p=5x+2=5.6+2=32
l=2x+3=2.6+3=15
2(5x + 2) + 2(2x + 3) = 94
10x + 4 + 4x + 6 = 94
14x + 10 = 94
14x = 94 - 10
14x = 84
x = 84/14
x = 6
panjang = 5x + 2 = 5(6) + 2 = 32cm
lebar = 2x + 3 = 2(6) + 3 = 15cm
Jadi, panjang dan lebar berturut turut adalah 32cm dan 15cm
Semoga membantu ^_^