4
Chat with our AI personalities
You add 10 to -7 to get 3.
The number is 21. 21 ÷ 3 = 7 7 - 3 = 4
-3/4 - 3/7 = (-3×7)/(4×7) - (3×4)/(7×4) = -21/28 - 12/28 = -33/28 You need to add -33/28 = -1 5/28
You need to add 7 (or +7)
you need to add +9 +9-7 = +2