K = 2 (p+l)
64 = 2 ( (3x+7)+(2x+5))
64 = 6x+14+4x+10
64 = 10x+24
10x = 64-24
X = 40/10
X = 4
P = 3x+7
P =3(10)+7
P = 37
L = 2x+5
L = 2(10)+5
L = 25
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64 = 2 (3x + 7 + 2x + 5)
64÷2 = 3x + 2x + 7 + 5
32 = 5x + 12
32 - 12 = 5x
20 = 5x
20÷5 = x
4 = x
• Panjang = 3x + 7
= 3 x 4 + 7
= 19 cm
• Lebar = 2x + 5
= 2 x 4 + 5
= 13 cm
maaf bila ada kesalahan
K = 2 (p+l)
64 = 2 ( (3x+7)+(2x+5))
64 = 6x+14+4x+10
64 = 10x+24
10x = 64-24
X = 40/10
X = 4
P = 3x+7
P =3(10)+7
P = 37
L = 2x+5
L = 2(10)+5
L = 25