Question: Please solve and explain these questions 50 Solve 9x = 3x+5. 54 The pressure (P) in a gas is equal to 0.87 where T is

Please solve and explain these questions

50 Solve 9x = 3x+5. 54 The pressure (P) in a gas is equal to 0.87 where T is the temperature measured in kelvin. The air resistance, R, in newtons, of an aeroplane is modelled by R = 5p2. a Find an expression for R in terms of T. b If the air resistance has a magnitude of 200 000 newtons, find the temperature in kelvin. 22 12 grams of carbon contains 6.02 x 1025 atoms. What is the mass (in grams) of one atom of carbon? Give your answer in the form a x 10* where 1

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