Question

What is the value of x?

Answer 1

These angles are opposite from each other, meaning they are the same.

Note: I'm pretty sure they are called opposite angles, but it's been a long time.

If they are the same, you would need to use an equal sign.

So the equation is x+40 = 3x

Now solve the equation. To remove the x from the left side, you subtract x.

(x+40)-x = (3x)-x

Note: Ignore the parentheses, they are used so you can clearly see the problem more (That doesn't make sense LOL).

Now we have 40 = 2x

Now we have to isolate the x, by removing the 2. Since 2 is multiplied to x, we have to divide it from both sides.

40÷2 = 2x÷2

You get 20 = x

Therefore, the value of x equals 20°

Answer 2

x = 20°

Explanation:

Step 1:

x + 40° = 3x Vertical Angles

Step 2:

40° = 2x Subtract x on both sides

Step 3:

x = 40° ÷ 2 Divide

Answer:

x = 20°

Hope This Helps :)