Question

please answer me and my question!!!!!!!!!!!!!!!!!!!!!!


verify the property x+y=y+x of rational numbers by taking.

(c) x=-3/7,y=20/21​

Answer 1

L.H.S

$=x + y \\ = ( - \frac{3}{7} + \frac{20}{21} ) \\ = ( - \frac{ 9}{21} + \frac{20}{21} ) \\ = \frac{11}{21}$

R.H.S

$= y + x \\ = ( \frac{20}{21} + \frac{ - 9}{</em></strong><strong><em>2</em></strong><strong><em>1</em></strong><strong><em>}) \\ = \frac{11}{21}$

THEREFORE L.H.S=R.H.S

PROVED

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