Shawn is solving the equation.
x/7-47=-6
One of his steps is to multiply both sides of the equation by 7. Why?
(1 point)
A. Multiplying both sides by 7 undoes the addition in the original problem.
B. Multiplying both sides by 7 undoes the subtraction in the original problem.
C. Multiplying both sides by 7 undoes the division of x by 7 in the original problem.
D. The negative sign in -6 must be changed to positive.