one step equations:
1: -15+n=-9
2: 15+b=23
3: m+4=-12
4: x-7=13
5: m-9=-13
6: p-6=-5
7:n+16=9
1: -15+n=-9
2: 15+b=23
3: m+4=-12
4: x-7=13
5: m-9=-13
6: p-6=-5
7:n+16=9