Question

How do you solve `\frac { b } { 13} - \frac { 3b } { 13} = \frac { 8} { 13}`?

Answer 1

`b=-4`

Explanation:

`color(white)(xx)b/13 - (3b)/13 = 8/13`

`rArr (b - 3b)/(13) = 8/13` [First, simplify the L.H.S]

`rArr b - 3b = 8` [Multiply both sides by `13`]

`rArr - 2b = 8`

`rArr b = 8/(-2) = -4`

Hence Explained.