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Easy

Question

If 7x + 21 = - 2, what is the value of x + 3 ?

  1. -5  
  2. -2  
  3. negative fraction numerator 5 over denominator 7 end fraction  
  4. negative fraction numerator 2 over denominator 7 end fraction  

The correct answer is: negative fraction numerator 2 over denominator 7 end fraction


    HINT: On simplification of the given equation, we get the value of x plus 3.
    Complete step by step Solution
    Given equation is 7 x plus 21 equals negative 2.
    On dividing both the sides by 7,
    We get, fraction numerator 7 x plus 21 over denominator 7 end fraction equals fraction numerator negative 2 over denominator 7 end fraction equals x plus 3 equals fraction numerator negative 2 over denominator 7 end fraction
    Therefore, x plus 3 equals fraction numerator negative 2 over denominator 7 end fraction
    Hence option D is the correct answer.
    Note: Given equation is 7 x plus 21 equals negative 2. On subtracting 21 on both the sides, we get 7 x equals negative 23.Next, on dividing both the sides by 7, we get x equals fraction numerator negative 23 over denominator 7 end fraction.We need x plus 3, so on adding 3 on both the sides, we get
    x plus 3 equals fraction numerator negative 2 over denominator 7 end fraction.

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