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2 ( p + l ) = 66
2 ( 4x + 5 + 3x - 7 = 66
2 ( 7x - 2) = 66
14x - 4 = 66
14x = 66 + 4
14x = 70
x = 70/14
x = 5
panjang = 4x + 5
= 4(5) + 5
= 20 + 5
= 25
lebar = 3x - 7
= 3(5) -7
= 15-7
= 8
luas = p x l
= 25 x 8
= 200cm²
jawabannya 200 cm²