Question 903201
{{{(77 + 94 + 58 + 78 + x)/5 >= 70}}}
 x = 350- (77 + 94 + 58 + 78 ) = 350-307 = 43
{{{(77 + 94 + 58 + 78 + x)/5 < 80}}}
x = 400 - (77 + 94 + 58 + 78 ) = 400 - 307 = 93
43 &#8804; x < 93