Question

verify x+y=y+x for x=-1/2 and y=3/5

Answer 1

no need to. as we can always x+y=y+x

Answer 2

$according \: to \: question \: x + y = y + x \\ x = \frac{ - 1}{2 \: } \: \: and \: y = \frac{3}{5} \\ \frac{ - 1}{2} + \frac{3}{5} = \frac{3}{5} + \frac{ - 1}{2} \\ \frac{ - 5 + 6}{10} = \frac{6 + ( - 5)}{10} \\ \frac{1}{10} = \frac{1}{10} \\ lhs = rhs \\ hence \: verified$