Divide the numbers
3
0
1
0
0
+
=
7
1
0
30
100
+
b
=
7
10
10030+b=107
3
1
0
+
=
7
1
0
3
10
+
b
=
7
10
103+b=107
2
Rearrange terms
3
1
0
+
=
7
1
0
3
10
+
b
=
7
10
103+b=107
+
3
1
0
=
7
1
0
b
+
3
10
=
7
10
b+103=107
3
Subtract
3
1
0
3
10
103
from both sides of the equation
+
3
1
0
=
7
1
0
b
+
3
10
=
7
10
b+103=107
+
3
1
0
−
3
1
0
=
7
1
0
−
3
1
0
b
+
3
10
−
3
10
=
7
10
−
3
10
b+103−103=107−103
4
Simplify
Subtract the numbers
Subtract the numbers
again
=
2
5
b
=
2
5
b=52
Solution
=
2
5
b