Question

answer is -71/60 but how​

Answer 1

Answer:

$\frac{ - 71}{60}$

Step-by-step explanation:

First, exchange their signs for finding LCM

$\frac{14}{ - 15} = \frac{ - 14}{15}$

Now, find the LCM of the denominators

2 | 20, 15, 10

2 | 10, 15, 5

3 | 5, 15, 5

5 | 5, 5, 5

1, 1, 1

LCM of 20, 15 and 10 = 2 × 2 × 3 × 5

= 60

$\frac{ - 7 \times 3}{20 \times 3} = \frac{ - 21}{60}$

$\frac{ - 14 \times 4}{15 \times 4} = \frac{ - 56}{60}$

$\frac{1 \times 6}{10 \times 6} = \frac{6}{60}$

$\frac{ - 21}{60} + \frac{ - 56}{60} + \frac{6}{60} = \frac{( - 21) + ( - 56) + 6}{60} = \frac{ - 71}{60}$