Write an Equation to Find the Number $3 x-6 x=-15 ; x=-5$

Multiple Choice

Write an equation to find the number. Solve.
-Six times a number subtracted from 3 times the number is equal to -15 .

A) $3 x-6 x=-15 ; x=-5$
B) $3 x-6 x=-15 ; x=5$
C) $6 x-3 x=-15 ; x=-5$
D) $6 x-3 x=-15 ; x=5$