First divide -3 by both sides. so then you will have (y-4)= -6 then you take the parenthesis away. y-4=-6 Now you add 4 to each side because addition is the opposite of subtraction. y= -6 + 4 which then becomes y= -2
Step-by-step explanation: He would need to go one level higher just to get to level one, and another 21 to get to the level that he wants to, so the total would be 22 levels.
