Question 47174
Hello there,

The first question:

(3/4 - 2/3) + (1/2 + 1/3)

= 3/4 - 2/3 + 1/2 + 1/3   <-- Remove bracket

= -1/3 + 1/2 + 3/4        <-- Simplify what you can

= (-4 + 6 + 9)/12         <-- Find the Lowest Common Multiple LCM and set the                 denominator to it.        

= 11/12 


With regards to your second question, I don't understand your third bracket. Could you please write it more clearly?