Question

This question is called "Create equations to solve for missing angles"

Help me!! Its very confusing.​

Answer 1

A

Explanation:

The 3 given angles form a straight angle and sum to 180°, hence

6x + 12x + 90 = 180 ← is the required equation

Answer 2

A

But it needs explanation.

Explanation:

The first one hides the fact, but it is indeed the answer.

6x + 12x = 90 degrees is the way the equation should actually be set up.

A does that by adding 90 to both sides to start with.

6x + 12x + 90 = 90 + 90

The reason it does this is to show that the three angles (6x 12x and 90 make up the entire straight angle shown in the diagram.

The answer is going to be the same.

18x = 90 Combine like terms on the left

18x /18 = 90 / 18 Divide by 18

x = 5