Answer 10 and 11. Please show work

VI. Solve each of the following. You must set up an equation and show all work. 10. One number is three times the first number. A third number is ten more than the first number. The sum of the three umbers is 105. Find all three numbers. 1 1. Linda scores on five tests were 84, 80, 76, 96, 80. What must she get on her sixth test so that her average for the six exams is 85