x

The core idea

Flowchart showing m = n + kp with forward operations multiply by p and add n, and reverse operations subtract n and divide by p to isolate k

Rearranging a harder formula means isolating one variable so the final line has xxx on its own on one side. The safest idea is balance: whatever you do to one side, you must do to the other side.

Rearranging Harder Formulae Lesson