3-(3/4)=(5/6) w=?

3-(3/4)=(5/6)w subtract 3/4 from left side

2 1/4=5/6w turn the left hand side into improper fraction

9/4=5/6w

5/6w=9/4 multiply both sides by 6/5

w=9/4 X 6/5

w=54/20 divides right hand side by 2

w=27/10