A6 If $3 a x+b=c$, then $x$ is equal to:
(A) $c-b+3 a$
(B) $c+b-3 a$
(C) $\frac{c+b}{3 a}$
(D) $\frac{b-c}{3 a}$
(E) none of the above

## II. PART
A6. We rearrange the equation $3 a x=c-b$, divide by $3 a$ and obtain the solution $x=\frac{c-b}{3 a}$.

## Set B