[tex]9x+10=12x-11[/tex]
We put 12x on the left side and 10 on right side
[tex]9x-12x=-11-10[/tex]
Now we add x and free numbers
[tex]-3x=-21[/tex]
And our result is:
[tex]x=7[/tex]
[tex]3(x-8)=5x+7[/tex]
[tex]3x-24=5x+7[/tex]
[tex]3x-5x=7+24[/tex]
[tex]-2x=31[/tex]
[tex]x=- \frac{31}{2} [/tex]
