Question

Solve for x.

x = 5°
x = 18°
x = 30°
x = 36°

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Answer 1

You can use a guess and check method for this.

Since you can assume line EB is 180 degrees, then you have the equation 3x+2x=180.
From there you can plug in the various answer choices and see which one lets the equation equal 180 deg.

Ex.)
Let's say you choose the answer choice of x = 18
Plug that x-value into the two given angles, so 3(18) + 2(18) = 180.
Then solve that equation.
If the left side is less than 180, then you know you need to choose an answer option with a higher x value. If the left side is greater than 180, choose an answer option with a lower x-value. If the equation is true and both sides equal 180 (180=180), then that's the right answer option.

Answer 2

Or you can just use algebra to solve.

3x+2x = 180

Add the like terms then divide both sides by the coefficient.