Which steps are needed to solve this equation? b +6-21
O Subtract 6 from both sides of the equation,
The answer is b- 15.
Check the solution by substituting 15 for b.
O Subtract 6 from the left side and add 6 to the right side of the equation.
The answer is b-27.
Check the solution by substituting 27 for b.
O Add 6 to both sides of the equation.
The answer is b - 27.
Check the solution by substituting 27 for b.
Add 6 to the left side and subtract 6 from the right side of the equation.
The answer is - 15.
Check the solution by substituting 15 for b.