Question 1059467
Remember the average formula.
You need to add up all scores of the tests and divide by the number of tests, 6.
This equation will equal his intended average, 79.
We know all test scores except the 6th score.
Let "x" represent the 6th score.
78 + 93 + 63 + 81 + 76 + x  
---------------------------  = 79
           6
Solve for "x" by first combining like terms.
Multiply by "6" on both sides.
Subtract the constant on both sides.