Rules for rearranging:

• Add, subtract, multiply and divide by anything, as long as you do the same thing to both sides of the equals sign:
• A + B = 2C is the same as (A + B)/2 = C or A = 2C - B

Use the Delta shortcut to rearrange division or multiplication:

• A = B x C
• B = A/C
• C = A/B