bekar

$x+y=y+x=0$

Commutative law for addition.

$x + y = y + x = \color{#69047E}{\boxed{0}}$ .

I liked the title

x+(-y)=0 (-y)+x=0

It's a commutative case, $x+y=y+x$ as the same as $x \times y= y \times x$

same thing

same question

the same question is continued again