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Determine the value of y, if x is 4 . y=(21)/(x-7) Answer:

Determine the value of y y , if x x is 44 .\newliney=21x−7 y=\frac{21}{x-7} \newlineAnswer:

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Full solution

Q. Determine the value of y y , if x x is 44 .\newliney=21x−7 y=\frac{21}{x-7} \newlineAnswer:
  1. Substitute xx into equation: Substitute the value of xx into the equation.\newlineWe are given y=21x−7y = \frac{21}{x-7} and we need to find the value of yy when xx is 44.\newlineSubstitute x=4x = 4 into the equation.\newliney=214−7y = \frac{21}{4-7}
  2. Perform subtraction in denominator: Perform the subtraction in the denominator.\newlineCalculate the value inside the parentheses (4−7)(4-7).\newliney=21−3y = \frac{21}{-3}
  3. Divide numerator by denominator: Divide the numerator by the denominator.\newlineNow, divide 2121 by −3-3 to find the value of yy.\newliney=21−3y = \frac{21}{-3}\newliney=−7y = -7

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