Let's solve each part step by step:
PART ONE:
To solve for \( x \) in the equation \( 3x = 12 \):
- Divide both sides by 3: \[ x = \frac{12}{3} = 4 \]
So, \[ x = 4 \]
PART TWO:
To solve for \( y \) in the equation \( y - 5 = 8 \):
- Add 5 to both sides: \[ y = 8 + 5 = 13 \]
So, \[ y = 13 \]
PART THREE:
To solve for \( x \) in the equation \( 12x = 10 \):
- Divide both sides by 12: \[ x = \frac{10}{12} = \frac{5}{6} \]
So, \[ x = \frac{5}{6} \]
Final Answers:
- Part One: \( x = 4 \)
- Part Two: \( y = 13 \)
- Part Three: \( x = \frac{5}{6} \)