First step is to simplify:
4x+9x+−4=2x+8
Combine Like Terms:
(4x+9x)+(−4)=2x+8
13x+−4=2x+813x−4=2x+8
Now you need to subtract 2x from both sides:
13x−4−2x=2x+8−2x
11x−4=8
Now, add 4 to both sides:
11x−4+4=8+4
11x=12
Then. divide both sides by 11:
11x/11=12/11
And now your answer is:
x=12/11
Good luck with your studies, I hope this helps!