solve each equation
3/8+b/3=5/12
We will need to isolate the unknown, i.e. to group all terms containing the unknown on the left-hand-side, and all the known quantities on the right.
If necessary, factor out the unknown and divide by its coefficient on both sides to find its value.
3/8 + b/3 = 5/12
Subtract 3/8 from both sides,
3/8-3/8 + b/3 = 5/12 - 3/8
b/3 = 10/24 - 9/24
b/3 = 1/24
Multiply both sides by 3
b = 3/24
= 1/8