4m=9m-20 equals what
4m=9m-20You need to get "m" all on one side.Take -9m from each side-5m=-20Divide -20 by -5m-20รท-5=4m=4
4m=9m-200=5m-20 (subtract 4m to both sides)5m=20 (add 20 to both sides)m=4 (divide by 5 to both sides)