Question 1143128
.
<pre>
{{{((80+95+75+90) + x)/5}}} = 88,


80 + 95 + 75 + 90 + x = 5*88


x = 5*88 - (80 + 95 + 75 + 90)


x = 100.     <U>ANSWER</U>


<U>CHECK</U>.   {{{(80 + 95 + 75 + 90 + 100)/5}}} = 88.
</pre>