To rearrange, we must work backwards
When working forwards, we use BIDMAS
Brackets
Indices
Division
Multiplication
Addition
Subtraction
F = g + 3h
In this example, we would do the multiplication, then addition
Therefore to find h, we work with the addition then the multiplication
When rearranging, we must always do the opposite of the operation to counteract it
First, we must get rid of the g
g is positive, so we subtract g on both sides of the equals sign to get rid of it
F = g + 3h
(-g) (-g)
F - g = 3h
Next, to get from 3h to h, we divide by 3 - therefore we do the same to the other side
F - g = 3h
(/3) (/3)
(F - g)/3 = h
h = (F - g)/3