Question 1205948
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To earn an A in a​ course, a boy must have a {{{cross(final)}}} average of at least 84​%. On the first four​ examinations, he has grades of 79​%, 85​%, 75​%, and 75​%. If the final examination counts as two ​grades, what must he get on the final to earn an A in the​ course?
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x the score for final examination;
2x representing two tests.


The first four tests and final examination count the same as 6 tests.

{{{(2x+79+85+75+75)/6>=84}}}


Solve for x.