Question

If b<0 and |b| = 4b+15 what is the value of b

Answer 1

If
`a<0` the
`|a|=-a`

So

`|b|=4b+15\\-b=4b+15\\5b=-15\\b=-3`

Answer 2

|b|= 4b+15

-b=4b+15

-b-4b= 15

-5b= 15

b= 15/-5

b= -3

the ans -3