jika keliling persegi panjang tersebut 50 cm.maka luasnya adaalh

keliling= 2p + 2l
50 = 2(2x +7) + 2(3x-2)
50 = 4x + 14 + 6x - 4
50 = 10x  10
50 - 10 = 10x
40 = 10x
x = 4

p= 2x +7 > 2.4 +7 = 15
l= 3x - 2 > 3.4 - 2 = 10

luas= P X L = 15 x 10 = 150 cm2