Question

Jika diketahui segitiga ABC dengan sisi a = 2x + 5, b = 3x - 2, dan c = 4x +6, maka hitunglah panjang masing masing sisi segitiga ABC, jika keliling segitiga ABC = 36 cm!

Answer 1

Keliling segitiga = sisi a + sisi b + sisi c
36 = 2X + 5 + 3X - 2 + 4X + 6
36 = 9X + 9
36 - 9 = 9X
27/9 = X
3 = X
kemudian subtitusikan, jadi panjang sisi
a = 11
b = 7
c = 18

Answer 2

2x + 5 + 3x - 2 + 4x + 6 = 36
9x + 9 = 36
9x = 36 - 9
9x= 27
x = 3

sisi a = 2(3) + 5
= 11 cm

sisi b = 3(3) - 2
= 7

sisi c = 4(3) + 6
= 18