Question

Enter in the number below that will make the right expression equivalent to the left expression:

1. 7+2+n=____+n
2. (3+7)+6=____+6
3. 2+(3+7)=2+___
4. 10+2+5=____
5. 7+(-4)+3=____+3
6. -11+8+n=____+n

Answer 1

1.9+n
2.10+6
3.2+10
4.17
5.3+3
6.-3+n