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I need help simplifying an expression:

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

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

Answer :

memory11

open the brackets then solve.

remember the flip the signs is needed.

[tex] \frac{(13x + 21) - (5x - 9)}{2} [/tex]

[tex] \frac{13x + 21 - 5x + 9}{2} [/tex]

[tex] \frac{8x + 30}{2} [/tex]

= 4x + 15

Therefore the ans is 4x+15.

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