1- Make \( r \) the subject of the relatio \( m=r p-k \).
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To make \( r \) the subject of the relation \( m = rp - k \), you need to isolate \( r \). Start by adding \( k \) to both sides of the equation: \[ m + k = rp. \] Next, divide both sides by \( p \): \[ r = \frac{m + k}{p}. \] And voilà! You've expressed \( r \) in terms of \( m \), \( k \), and \( p \). Math magic at its finest! Now that you have \( r \) isolated, it's a good time to check your equation by substituting values back in. Common mistakes often involve forgetting to distribute or arrange terms correctly. Make sure you double-check your operations and keep those variables tidy!