Question

If 18=1-3a, then a= (17/3,19/3,-17/3, -19/3)​

Answer 1

$\huge\bf\purple{ANSWER:-}$

18=1-3a

=> 18-1= -3a

=> 17= -3a

$a = \frac{ - 17}{3}$

Option B is the correct answer

Answer 2

18 = 1 - 3 a

18 - 1 = - 3 a

17 = - 3 a

a = - 17 / 3