Question

Tentukan nilai x, y dan z
X + y + z =45
X + 4 =y
Z - 17 =x

Answer 1

X + y + z = 45
x + (x + 4) + z = 45
2x + z + 4 = 45
2x + z = 41
2(z - 17) + z = 41
2z - 34 + z = 41
3z = 75
z = 25

sub nilai z = 25 ke pers z - 17 = x
25 - 17 = x
8 = x

sub nilai x = 8 ke pers x + 4 = y
8 + 4 = y
12 = y

jadi nilai x = 8, y = 12, z = 25