Question

3b - 39 = -78

Explanation:

Step1: Add 39 to both sides

To isolate the term with \( b \), we add 39 to both sides of the equation \( 3b - 39 = -78 \). This gives us \( 3b - 39 + 39 = -78 + 39 \). Simplifying both sides, we have \( 3b = -39 \).

Step2: Divide by 3

Now, to solve for \( b \), we divide both sides of the equation \( 3b = -39 \) by 3. So, \( \frac{3b}{3} = \frac{-39}{3} \), which simplifies to \( b = -13 \).

Answer:

\( b = -13 \)