Question

the multiplicative inverse of (a+b) is 1/-12if a=4 what is value of b?

Answer 1

ATQ :
1/(a + b) = 1/-12
and a = 4
so 1/(4 + b) = 1/-12
or (4 + b) = -12
b = -12 - 4
b = -16
therefore the value of b = -16

Answer 2

Multiplicative Inverse of (a+b) = 1/-12

=> 1/(a+b) = 1/-12

=> 1/(4+b) = 1/-12 .......(since, a=4)

=> 4 + b = -12

=> b = -12 -4

=> b = -16.