Diketahui segitiga ABCdengan sisi a= 2x+4 ,b=4x-2,c=4x+2.jikakeliling segita ABC =84cm,maka hitunglah panjang masing masing sisi segitiga ABC !

K = a + b + c
84 = 2x + 4 + 4x – 2 + 4x + 2
84 = 10x + 4
10x = 84 – 4
10x = 80
x = 80/10
x = 8

a = 2x + 4 = 16 + 4 = 20
b = 4x – 2 = 32 – 2 = 30
c = 4x + 2 = 32 + 2 = 34