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11-34.

Two mechanics can assemble $10$ bicycles in $8$ hours. At the same rate, how many mechanics would be needed to assemble $25$ bicycles in $10$ hours?

What is the work rate of one mechanic?

Write an equation.
$\text{(rate of a mechanic)(total mechanics)}= \frac{25\text{ bicycles}}{10\text{ hours}}$

$\frac{5\text{ bicycles}}{8\text{ hours}} (x) = \frac{25\text{ bicycles}}{10\text{ hours}}$

$4$ mechanics