diketahui keliling persegi panjang 22 cm.jika sisi terpanjangnya 5x-3 dan sisi lainnya 3x-1.Hitunglah panjang masing masing sisi

22 = 2 x (5x-3+3x-1)
22/2 = 8x-4
11 = 8x-4
x = 15/8
p = 75/8 - 24/8 = 51/8 = 6,375 cm
l = 45/8 - 8/8 = 37/8 = 4,625 cm

5x - 3 + 3x - 1 = 11
5x + 3x = 11 + 3 + 1
8x = 15
x = 15/8
x = 1,875

5x - 3 = 5(1,875) - 3
9,375 - 3 = 6,375

3x - 1 = 3(1,875) - 1
5,625 - 1 = 4,625