Shawnece is solving the equation z/7 - 4 = - 6 One of her steps is to multiply both sides of the equation by 7. Why? (1 point)
The negative sign in-6 must be changed to positive.
Multiplying both sides by 7 undoes the addition in the original problem.
Multiplying both sides by 7 undoes the subtraction in the original problem.
Multiplying both sides by 7 undoes the division of z by 7 in the original problem