There is no solution to this equation
X≠0
The answer would be 3=6 which is an invalid answer therefor an equation with no solution.
-5x+10x+3=5x+6
Combine like terms first
5x+3=5x+6
After this whether you make it 10x=9 that’s still an invalid answer but if you subtracted 5x on both sides it’d be 3=6
Therefore x≠0