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Question:

Meghan raised funds for the Cancer Society for seven straight days. She raised the following amounts:
$525, $350, $275, $630, $1,010, $275, and x.
What would the value of x equal if the average funds collected were $500?

A $435
Explaination

If the average is $500, then
($525 + $350 + $275 + $630 + $1,010 + $275 + x) ÷ 7 = $500.
Solve for x.
($3,065 + x) ÷ 7 = $500
$3,065 + x = 7 × $500 = $3,500
x = $3,500 - $3,065 = $435