Question 335218
{{{2x-6y+2z-5x-3y+8z}}} Start with the given expression.



{{{(2x-5x)+(-6y-3y)+(2z+8z)}}} Group like terms



{{{-3x-9y+10z}}} Combine like terms.



So {{{2x-6y+2z-5x-3y+8z=-3x-9y+10z}}}