Respuesta :

-8x-5x = -13x
1.) -8x + -5x
2.) -13x
Simplify both sides  8x 5x =13x which would equal 13x = 13x

Than add 13x to both sides: −13x  + 13x = 13x + 13x

So, the answer is 0=0,
which could be said as
all real numbers are solutions.