15=x+13

EASY. subtract 13 from both sides, and it's (x=2)

thank you i didnt even know that

x+11=9

Let's see what you learned from the last problem.

What do you think you should do?

but i dont know if my answer is write

Post it and I will check it.

18

x+11=9

You need to move the 11 to the other side. Since it's a positive number, you need to subtract it from both sides;

x = -2

x-17=-9
x=26

No.

Add 17 to both sides.

Remember, you're trying to get the number to the other side. So you add a negative number to both sides. You subtract a positive number from both sides.

Study this site.

https://www.mathsisfun.com/algebra/equations-solving.html

15=x+13
do i do the 15 or 13

You need to move 13 so that the x is on one side and the numbers are on the other.

Are you going to add or subtract 13?

is it 26

add

No.
Remember you want to get the x alone.

i dont get it

Study that website I linked.

i dont get that either

I'm sorry.

Please talk with your teacher. You may need a personal tutor.

what about -12x=12

do i multiply

No. Divide both sides by -12

so that would be 1

-9x=27

am i multiplying 9

It would be -1. A positive divided by a negative is a negative.

To find the numerical value of x, you need to divide 27 by -9.

-4=x-22
would it be add

You clearly did not study the web site that was given to you. You had posts about every 3 minutes for a half hour, at which time you said you didn't understand the web site. I call BS. You had not had time to spend any time looking at it.