Question

Verify that, x + y = y + x for the following
1. x = -7/9 ; y = 3/7​

Answer 1

$LHS = x + y \\ = - \frac{ 7}{9} + \frac{3}{7} \\ = \frac{ - 49 + 27}{63} \\ = \frac{ - 22}{63}$

$RHS = y + x \\ = \frac{3}{7} + \frac{ - 7}{9} \\ = \frac{27 - 49}{63} \\ = \frac{ - 22}{63}$

Since, L.H.S = R.H.S

HENCE PROVED....