Question

I need help simplifying an expression:

(13x + 21) - (5x - 9)
______________
2

If you could walk me through the problem that would be very appreciated!

Answer 1

open the brackets then solve.

remember the flip the signs is needed.

`((13x + 21) - (5x - 9))/(2)`

`(13x + 21 - 5x + 9)/(2)`

`(8x + 30)/(2)`

= 4x + 15

Therefore the ans is 4x+15.