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. Multiplying both sides by 7 undoes the addition in the original problem
2. Multiplying both sides by 7 undoes the subtraction in the original problem
3. Multiplying both sides by 7 undoes the division of x by 7 in the original problem
4. The Negative sign in -6 must be changed to positive