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Lebar = x
Panjang = x + 18
2(x) + 2(x + 18) = 76
2x + 2x + 36 = 76
2x + 2x = 76 - 36
4x = 40
x = 10
L = p . l
= (x + 18) . x
= (10 + 18) . 10
= 28 . 10
= 280
Jadi, luasnya adalah 280 cm
lebar = x
panjang = x + 18
2 (×) + 2(x+18)=76
2×+2×+36=76
2x+=76-36
4×=40
×=10
luas = p x l
=(×+18) × x
=(10+18)×10
=28×10
=280
maaf klo salah