Question 701200
Dominic bowled two games, scoring 206 and 176.
 What must he bowl in the third game in order to have a 227 average for these 3 games?
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Here is an easy way to do this:
let x = the 3rd game score necessary for 227 average
:
{{{(x + 206 + 176)/3}}} = 227
multiply both sides by 3, add the two scores
x + 382 = 3(227)
Multiply 3 times 227 and Subtract 382 from both sides
x = 681 - 382
x = 299 is the score you need, 
:
;
You can check this yourself
{{{(299 + 206 + 176)/3}}} =