Question

This is for a test review, i’ve tried ever way and still can’t seem to get the correct answer. help!

Answer 1

Answer:

x=12

Step-by-step explanation:

All angles in a triangle always equal 180 degrees

1. Add all of your angles and set them equal to 180

3x+7+74+63=180

2. Simplify

3x+144=180

3. Combine Like-Terms (Subtract 144 from both sides)

3x=36

4. Simplify

x=12

Answer 2

Answer:

x=12

Step-by-step explanation:

To find the missing angle of this scalene triangle you must make sure all three angles add up to 180°.

Since you're already provided with 63° and 74°, you are able to get the third angle:

First, add 63+74, which gets you 137.

Next, subtract 137 from 180. (180-137=43).

So, the missing angle is 43.

Now, to solve for x, here's a reference equation:

3x+7=43.

Subtract 7 from both sides to get:

3x=36.

Then, divide both sides by 3:

3x/3=x,36/3=12

So, you end up with:

x=12.

Hope this helps!