How would I solve 10x-9x=x

Question

10x-9x=x

example answer 10890-9801=1089

Answer 1

10x - 9x = x is a tautology. It's always true. It's an identity, which is true regardless of the value of x. x can be any real or imaginary number and the equation is still true.

if x = 1, 10-9=1

if x =10, 100-90=10

if x =4pi+7isqr2, the equation is still true.

10x-9x = x

(10-9)x=x

(1)x =x

x=x

substitute any value, number, imaginary, irrational, real or even an object and x=x is still true. pi=pi, sqr41 = sqr42, pi+i = pi+i, red=red, rooster=rooster