Maths-
General
Easy

Question

ka + nb = 10
The given equation relates the positive numbers a, b, k and n. Which of the following correctly expresses a in terms of b, k , and n ?

  1. a equals 10 minus fraction numerator k over denominator n b end fraction
  2. a equals 10 minus fraction numerator n b over denominator k end fraction
  3. a equals fraction numerator 10 minus k over denominator n b end fraction
  4. a equals fraction numerator 10 minus n b over denominator k end fraction

The correct answer is: a equals fraction numerator 10 minus n b over denominator k end fraction


    HINT: Modify the given equation
    Explanation:
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell k a plus n b equals 10 end cell row cell k a equals 10 minus n b end cell row cell k cross times a equals left parenthesis 10 minus n b right parenthesis end cell row cell therefore a equals fraction numerator 10 minus n b over denominator k end fraction end cell end table

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