Question

solve -3/7+ [-5/21]​

Answer 1

$\frac{ - 3}{7} - \frac{5}{21}$

$\frac{ - 9 - 5}{21}$

$- \frac{14}{21}$

Answer 2

Step-by-step explanation:

For the 1st fraction, since 21 × 1 = 21,

5

21

=

5 × 1

21 × 1

=

5

21

Likewise, for the 2nd fraction, since 7 × 3 = 21,

3

7

=

3 × 3

7 × 3

=

9

21

Add the two fractions:

5

21

+

9

21

=

5 + 9

21

=

14

21

14/21 simplified gives

2

3

So, 5/21 + 3/7 = 2/3

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