Can someone please explain to me how to solve for X?

Question

anonymous · Answer

attachment

dtan5457 · Answer

Opposite angles are congruent therefore

7x+13=8x-8

solve for x.

anonymous · Answer

I got that part, but I'm not really sure how to solve for X.

dtan5457 · Answer

hmm. subtract the 8x and subtract the 13, so you have all x values to one side, and regular numbers to the other

dtan5457 · Answer

understand?

anonymous · Answer

I think so. Thanks.

dtan5457 · Answer

To make sure, what did you get for your x value?

anonymous · Answer

I'm still trying to solve it, but I think I might be able to get it.

dtan5457 · Answer

ok. take your time, let me know what you get, so i can check your answer, though

anonymous · Answer

Okay. Thank you again.

anonymous · Answer

I don't think I did this correctly, but this is what I got.
7x+13=8x-8
7x+13=x
6=x

Sorry. I moved to a new school & they didn't teach this.

dtan5457 · Answer

hmm not quite.

7x+13=8x-8
-8x      -8x

-x+13=-8
     -13   -13

-x=-21

switch signs

x=21

anonymous · Answer

Oh okay, that makes a lot more sense. Thank you so much!

dtan5457 · Answer

alright, no problem. any more questions ?

anonymous · Answer

no, I don't think so.

dtan5457 · Answer

alright. feel free to fan and medal for further help in the future.

see ya :)

anonymous · Answer

Okay, I will. Thanks again.