SOLUTION: Please solve this question The average of 4 numbers is 10.5. If the average of 3 of them is 9 , what is the 4th number ? Regards

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Please solve this question The average of 4 numbers is 10.5. If the average of 3 of them is 9 , what is the 4th number ? Regards      Log On