To solve for \( d \) in the equation: \[ 10d + 50 = 170 \] Follow these steps: 1. Subtract 50 from both sides: \[ 10d = 170 - 50 \] \[ 10d = 120 \] 2. Now, divide both sides by 10: \[ d = \frac{120}{10} \] \[ d = 12 \] So, the solution is \[ d = 12 \]