Question

How do you solve `\frac { 13- b } { 6} - \frac { 2- 0.5b } { 4}`?

Answer 1

Note that this expression can be simplified
but it can not be "solved"

Explanation:

Given
`color(white)("XXX")(13-b)/6-(2-0.5b)/4`

`color(white)("XXX")=(13-b)/6xx2/2 -(2-0.5b)/4 xx3/3`

`color(white)("XXX")=(26-2b)/12 - (6-1.5b)/12`

`color(white)("XXX")=(20-3.5b)/12`