Answer:
x = -54
Step-by-step explanation:
Let's solve your equation step-by-step.
[tex] \sf \: `-\frac{1}{3}x=18`[/tex]
Step 1: Multiply both sides by 3/(-1).
[tex] \sf( \frac{3}{ - 1} ) \times ( \frac{ - 1}{3} x) = ( \frac{3}{ - 1} ) \times (18)[/tex]
[tex] \sf \: x = - 54[/tex]