Question 987898

Aldo has scored 

{{{83}}}, {{{69}}}, {{{92}}}, {{{92}}}, and {{{90}}}on his previous five tests, to have an average (mean) of {{{81}}}, he will need

{{{(83+69+92+92+90+x)/6=81}}}....solve for {{{x}}}

{{{83+69+92+92+90+x=81*6}}}

{{{426+x=486}}}

{{{x=486-426}}}

{{{x=60}}}