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Combined Gas Laws: (Boyle, Charles, and Gay-Lussac's Laws combined)

Please click image below because I can't write the letters in subscript.

    P₁ = Initial Pressure
    V₁ = Initial Volume
    T₁ = Initial absolute temperature
    Pf = Final Pressure
    Vf = Final Volume
    Tf = Final absolute temperature

Absolute temperatures are measured in Kelvin, NOT Celsius or Farenheit.  Also, do not write the degree symbol.  
       Example:  187 K, not 187⁰ K.