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Check Whether the Value Given in the Brackets is a Solution to the Given Equation Or Not: 7n + 5 = 19 (N = − 2) - CBSE Class 7 - Mathematics

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Question

Check whether the value given in the brackets is a solution to the given equation or not:

7n + 5 = 19 (n = − 2)

Solution

7n + 5 = 19 (n = −2)

Putting n = −2 in L.H.S.,

7n + 5 = 7 × (−2) + 5 = −14 + 5 = −9 ≠ 19

As L.H.S. ≠ R.H.S.,

Therefore, n = −2 is not a solution of the given equation, 7n + 5 = 19.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics for Class 7 (2018 to Current)
Chapter 4: Simple Equations
Ex. 4.10 | Q: 2.2 | Page no. 81
Solution Check Whether the Value Given in the Brackets is a Solution to the Given Equation Or Not: 7n + 5 = 19 (N = − 2) Concept: Concep of Equation.
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