Solve word problems leading to equations of the form px + q = r and p(x + q) = r, where p, q, and r are specific rational numbers. Example: The perimeter of a rectangle is 54 cm. Its length is 6 cm. What is its width?
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Mary earned $$\$35.00$$ for walking her neighbor's dogs.
$\quad\bullet\enspace$ Mary charged a flat fee of $$\$5.00$$ to walk the dogs.
$\quad\bullet\enspace$ Mary also charged $$\$2.50$$ for each $\frac{1}{4}$ hour she walked the dogs.
For exactly how many hours did Mary walk her neighbor's dogs?
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M07.B-E.2.2.1
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Mary earned $$\$35.00$$ for walking her neighbor's dogs.
$\quad\bullet\enspace$ Mary charged a flat fee of $$\$5.00$$ to walk the dogs.
$\quad\bullet\enspace$ Mary also charged $$\$2.50$$ for each $\frac{1}{4}$ hour she walked the dogs.
For exactly how many hours did Mary walk her neighbor's dogs?