Question

Equação -

2x - 5 = 16 - X

Answer 1

2x-5=16-x

2x+x=16+5

3x=21

x=21/3

x=7

Answer 2

$2x-5=16-x\to\\\\ 2x+x=16+5\to \\\\ 3x=21\to \\\\ x= \dfrac{21}{3} \to \\\\ \large\boxed{x=7}$