suatu Persegi Panjang, Panjangnya (2x - 3) Cm Dan Lebarnya (x + 2),jika kelilingny 34 Cm, Panjangnya Adalah?

Dik : p = (2x-3) cm
l = (x +2) cm
Keliling = 34 cm
Dit : p =?
Jawab
2 (p+l) = 34 cm
2 (2x-3 + x+2) = 34
2 (3x -1) = 34
6x - 2 = 34
6x = 34 + 2
6x = 36
X = 6

P = 2x - 3
P = 2 (6) - 3
P = 12 - 3
P = 9 cm

Keliling = 2(P + L)
34. = 2(2x - 3 + x + 2)
34. = 2(3x - 1 )
34. = 6x - 2
34 + 2 = 6x
36 = 6x
x = 36/6
x = 6

Maka , Panjang = 2x - 3
= 2.6 - 3
= 12 - 3
= 9 cm