SOLUTION: On 3 tests, the average grade is 91. What must you average on the last 3 tests to have at least an average of 94?

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Question 897369: On 3 tests, the average grade is 91. What must you average on the last 3 tests to have at least an average of 94?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%28A%2BB%2BC%29%2F3=91
A%2BB%2BC=3%2A91
A%2BB%2BC=273
.
.
.
%28D%2BE%2BF%29%2F3=X
D%2BE%2BF=3X
So then, the total average is,
%28A%2BB%2BC%2BD%2BE%2BF%29%2F6=94
A%2BB%2BC%2BD%2BE%2BF=564
Substituting,
%28273%29%2B3X=564
3X=291
X=97
You need to average a 97.