Question

What is 2x + 3 = x + 3 + x

Answer 1

2x + 3 = x + 3 + x has no solution
because if you rearrange it:
 2*x+3-(x+3+x)=0 it would equal 0

Answer 2

$2x+3=x+3+x$

$2x+3=2x+3$

$2x-2x=3-3$

$0=0$

x∈R