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## The Webmaster Algebra

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Solution Step 0/0

A webmaster looked at the ad revenues at his website. The account showed “Today’s Earnings” as \$0.01, “Yesterday’s Earnings” as \$1.33, and “This Month’s Earnings” as X.

The very next day the webmaster logged in once again. This time, “Today’s Earnings” was \$0.04, while “Yesterday’s Earnings” was \$1.51, and “This Month’s Earnings” was now \$9.69.

Given that both days are in the same month, can you determine the X?

### Explanations

“Today’s Earnings” of \$0.01 from day 1 are a part of “Yesterday’s Earnings” of \$1.51 from day 2. Thus, an additional amount of \$1.50 has been earned for day 1.

Adding the \$0.04 in “Today’s Earnings” from day 2, makes \$1.54 earned in total between the two logins. That amount added to X from day 1 gives the total amount earned as of day 2: \$9.69.

Thus, X = \$9.69 – \$1.54 = \$8.15.

Check Between \$7.91 & \$8.04
Check Between \$8.05 & \$8.13
Check Between \$8.14 & \$8.35
Check Between \$8.36 & \$8.42