Answer:

Step-by-step explanation:
Combining like-terms gives us 
Hope this helped!
Answer:
36
Step-by-step explanation:
56=7-3[4+{8-4(4+5-3)}]
56=7-3[4+{4(4+5-3)}]
56=7-3[4+{16+20-12)}]
56=7-3[4+24]
56=4[28]
56=92
56-56=92-56
36
The number is 21 because 2 is 1 doubled, and 2+1 is 3.
Its already an improper fraction.
If you mean mixed number it would be 7 4/7.
Hope this helps!:)
Answer:
Step-by-step explanation:
A