Question 290657
Tom scored 82, 73, 80, 76, and 84 on five exams. What grade must Tom obtain on his sixth exam to have an average of 80?


Let the missing score be "X", therefore, the equation becomes:


{{{(82+73+80+76+84+x)/6=80}}}
{{{82+73+80+76+84+x=(80*6)}}}
{{{395+x=480}}}
{{{x=480-395}}}
{{{x=85}}}


Now check your answer by replacing the x value in the original equation:
{{{(82+73+80+76+84+x)/6=80}}}
{{{(82+73+80+76+84+85)/6=80}}}


I'll let you finish it.