Question

If a is -3/-11 and b is -7/5 then show that a+b is equal to b+a​

Answer 1

Answer:

$a+b=\frac{3}{11} +\frac{-7}{5}$

      $=\frac{15}{55} -\frac{77}{55}$

      $=\frac{-62}{55}$

$b+a=\frac{-7}{5} +\frac{3}{11}$

       $=\frac{-77}{55} +\frac{15}{55} \\\\\=\frac{-62}{55}$

a+b=b+a

Hence proved