Simplest form (+6x)+(-4x)+(-5x)+(10x)

show all work

6x-4x-5x+10x

=7x

The simplest form is to ADD all of the coefficients
since all of the numbers are attached to x.

[6 + (-4) + (-5) + 10] x = 7x

take out the brackets, they are useless in this question, equation will be
6x-4x -5x+10x = 7x

6x-4x-5x+10x

= 7x