For what value of a, the system of equations is inconsistent
ax + 3y = a - 3
12x + ay = a
System will be inconsistent will be when
a1/a2 = b1/b2 ≠ c1/c2
ax + 3y = a - 3
12x + ay = a
a/12 = 3/1 ≠ a-3/a
⇒ a = ± 6
But +6 doesn’t satisfy
a/12 = 3/1 ≠ 1-3/a
Thus, a = - 6