Answer:
The answer is -5
Step-by-step explanation:
[tex]\mathrm{Group\:like\:terms}\\x+2x+20=10-2x-15[/tex]
[tex]\mathrm{Add\:similar\:elements:}\:x+2x=3x\\3x+20=10-2x-15[/tex]
[tex]\mathrm{Group\:like\:terms}\\3x+20=-2x+10-15[/tex]
[tex]\mathrm{Add/Subtract\:the\:numbers:}\:10-15=-5\\3x+20=-2x-5[/tex]
[tex]\mathrm{Subtract\:}20\mathrm{\:from\:both\:sides}\\3x+20-20=-2x-5-20[/tex]
[tex]\mathrm{Simplify}\\3x=-2x-25[/tex]
[tex]\mathrm{Add\:}2x\mathrm{\:to\:both\:sides}\\3x+2x=-2x-25+2x[/tex]
[tex]\mathrm{Simplify}\\5x=-25[/tex]
[tex]\mathrm{Divide\:both\:sides\:by\:}5\\\frac{5x}{5}=\frac{-25}{5}[/tex]
[tex]\mathrm{Simplify}\\x=-5[/tex]
Hope this helps you greatly!
Have a great afternoon!
