Question: 14. Solve the linear equation.
12x - 2 = 2x + 18
x = -2
x = 2
x = 7/10
x = 10/7
1. **State the problem:** Solve the linear equation $$12x - 2 = 2x + 18$$.
2. **Write down the formula and rules:** To solve a linear equation, we isolate the variable $x$ by performing the same operations on both sides of the equation.
3. **Step 1: Move all terms with $x$ to one side.**
$$12x - 2 = 2x + 18$$
Subtract $2x$ from both sides:
$$12x - 2x - 2 = 2x - 2x + 18$$
$$10x - 2 = 18$$
4. **Step 2: Move constant terms to the other side.**
Add $2$ to both sides:
$$10x - 2 + 2 = 18 + 2$$
$$10x = 20$$
5. **Step 3: Solve for $x$ by dividing both sides by $10$.**
$$\frac{\cancel{10}x}{\cancel{10}} = \frac{20}{10}$$
$$x = 2$$
6. **Final answer:**
$$x = 2$$
This matches the second answer choice.