Question

answer in brief and full explanation please...​

Answer 1

Answer:

14. The number is 15/4.

15. The number is -25/12

Step-by-step explanation:

14. 7/4 - a = -2

=> -a = -2 - 7/4

=> -a = -8 - 7/4

=> -a = -15/4

=> a = 15/4

15. (1/2+1/3+1/4) + a = -1

=> 12 + 8 + 6/24 + a = -1

=> 26/24 + a = -1

=> 13/12 + a = -1

=> a = -1 - 13/12

=> a = -12 - 13/12

=> a = -25/12

Answer 2

Step-by-step explanation:

$14.)let \: the \: no. \: be \: x \\ so \: \: \: x - \frac{7}{4 } = - 2 \\ \\ x = \frac{7}{4} - 2 = \frac{7 - 8}{4} = \frac{ - 1}{4}$

$15.)let \: the \: no. \: be \: x \\ so \: \: \: ( \frac{1}{2} + \frac{1}{3} + \frac{1}{4} ) + x = - 1 \\ \\ = \frac{6 + 4 + 3}{12} + x = - 1 \\ \\ = \frac{13}{12} + x = - 1 \\ \\ x = - 1 - \frac{13}{12} = \frac{ - 12 - 13}{12} \\ \\ = \frac{ - 25}{12}$