[tex]-4x -5 + x = -10x+30\\-3x-5 = -10x+30/+10x\\7x-5 = 30/+5\\7x = 35/:7\\x = 5[/tex]
-4x-5+x=-10x+30
-4x+x+10x=5+30
7x=35/:7
x=5
