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The maximum recommended pulse rate R, when exercising , for a person who is x years of age is given by the equation R = 176- 0.8 x. what is the age , in years , of a person whose maximum recommended pulse rate when exercising is 140?

The maximum recommended pulse rate R, when exercising , for a person who is x years of age is given by the equation R = 176- 0.8 x. what is the age , in years , of a person whose maximum recommended pulse rate when exercising is 140? Correct Answer 45

প্রশ্নানুসারে,140 = 176 - 0.8x<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x21D2;</mo></math> 0.8x = 176 - 140<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x21D2;</mo></math> 0.8x = 36<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> x = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>36</mn><mrow><mn>0</mn><mo>.</mo><mn>8</mn></mrow></mfrac></math> = 45

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The maximum recommended pulse rate R, when exercising .for a person who is x years of age is given by the equation R = 176 - 0.8 x . what is the age, in years , of a person whose maximum recommended pulse rate when exercising is 140?
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