MENENTUKAN NILAI X
9x + 108 = 180
9x = 180 – 108
9x = 72
x = 72/9
x = 8
MENENTUKAN NILAI Y
5x + 3y + 56 = 180
5(8) + 3y + 56 = 180
40 + 3y + 56 = 180
3y + 96 = 180
3y = 180 – 96
3y = 84
y = 84/3
y = 28
MENENTUKAN NILAI Z
9x + 4z + 56 = 180
9(8) + 4z + 56 = 180
72 + 4z + 56 = 180
4z + 128 = 180
4z = 180 – 128
4z = 52
z = 52/4
z = 13
Semoga memantu.
