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If x2 = 3, then the value of 3x + 2 is ______. - Mathematics

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Question

If `x/2` = 3, then the value of 3x + 2 is ______.

Options

  • 20

  • 11

  • `13/2`

  • 8

MCQ
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Solution

If `x/2` = 3, then the value of 3x + 2 is 20.

Explanation:

Given, `x/2` = 3

On multiplying both sides by 2, we get `x/2 xx 2` = 3 × 2 

⇒ x = 3 × 2 = 6

Put x = 6 in the equation 3x + 2, we get

3(6) + 2 = 18 + 2 = 20

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Chapter 4: Simple Equations - Exercise [Page 106]

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NCERT Exemplar Mathematics [English] Class 7
Chapter 4 Simple Equations
Exercise | Q 16. | Page 106
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