Question

3+q+9=12

q=18

q=0

q=6

q=24

Answer 1

@triciaal

Answer 2

3+9=12, so q+12=12

Answer 3

So you'll have to start from simplify both sides of the equation \(\ 3+q+9=12\)
\(\ q+12=12\)
than subtract \(\ 12\) from both sides \(\ q+12−12=12−12\)
So you'll end up with \(\ q=0\)