That's simple logic. I don't know why they don't get it, xD. But just to be annoying...(they better get this)

According to the subtraction property of equality, we can both subtract 5g and 18 from the equation, making 2g - 10 equaling 0. Then we can use the addition property of equality, so 2g equals 10, then according to the division property of equality, g equals 5.

(This is sweet revenge for my class having to review the properties of equality all over again.)

Situation 2:

(I don't remember the exact question, so I'm making the angles up...)

(Given picture of a figure and a plane [mathematical plane], supposed to find measure of angle FBT. My classmates have already solved it through a system of linear functions, finding out the values of x and y.)

Teacher: (apparently thinks I spaced out) "Galaxian, would you like to tell the class how you got the answer?"

Me: Sure. Since Angle DBG and DBF equal 69, then Angles ABC and DBZ also equal 69. The missing measure would then be 34 for angle ABJ, and thus the measure of angle FBT would be 54.

Rest of class: ...

Teacher: Could you please repeat that?

Me: Sure. *repeats*

Rest of class: ...

Teacher: Could you please repeat that again, Galaxian? ...

Me: ...sure...*repeats*

Rest of class: ...

Teacher: ...um, could you repeat again?

Me: o_O (I've explained it 3 times and you still don't get it. Forget it. I'm going to get a drink of water.)

*Note: I explained it with more terminology and detail in the actual class.*

-Galaxian Explosion-