Question

1. $-3 = \frac{5 + r}{3}$

Explanation:

Step1: Multiply both sides by 3

To eliminate the denominator, multiply each side of the equation \(-3 = \frac{5 + r}{3}\) by 3. This gives \(3\times(-3)=3\times\frac{5 + r}{3}\), which simplifies to \(-9 = 5 + r\).

Step2: Subtract 5 from both sides

To solve for \(r\), subtract 5 from both sides of the equation \(-9 = 5 + r\). So, \(-9 - 5 = 5 + r - 5\), which simplifies to \(-14 = r\).

Answer:

\(r = -14\)