Isolating Variables
Do the same operation to both sides; undo in reverse order (PEMDAS backwards)
Common Rearrangements
v = d/t → d = vt → t = d/v
Quadratic Shortcut
If ax² + bx + c = 0, try factoring first; x = (−b ± √(b²−4ac)) / 2a
Systems of Equations
Substitute or eliminate one variable
Key Formulas
PV=nRT | F=ma | KE=½mv² | ΔG=ΔH−TΔS
Plug & Chug
Substitute known values, simplify step by step
