Question

2x +1 = 7x + 3
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3 15
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Answer 1

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2x + 1 = 7x + 3

1 - 3 = 7x - 2x

-2 = 5x

5x = -2

x = -2/5

x = -0.4

Answer 2

Answer:

Mrs.Rita Arora, the class teacher of 6th standard. Came up to the board on the 1st period and wrote that down. She declared the first one to come up with the most appropriate approach for solution would be declared as the Captain for the month.

Rahul was the first to raise his hand, and came up to the board to write that down

=2x∗7x+2x∗3+1∗7x+1∗3  

=14x²+6x+7x+3  

=14x²+13x+3  

A great and simplified approach, Eh?

Ashish as usual argued about having a better procedure for that.

He came up to write down;

(2x+1)(7x+3)  

= (product of the coefficients of x)x ²+ (sum of them)*x + product of constants.

=  (2∗7)x²  +(6+7)x+3  

= 14x²+13x+3  

Everybody frowned upon him. It was the same approach. Only little theorized argued Ashish.

Then Joanna raised her hand for the first time. She was a quiet and shy student of her class. It came to surprise for her fellow classmates to see her taking part.

She came to the board to write ;

  (  2x+1)  

 *( 7x+3)  

6x+3  

14x²+7x∗  

14x²+13x+3  

Then Joanna went back to her seat quietly, looking at the witty face of her classmates.

Mrs.Rita got tensed about declaring the class captain. She declared that to be announced the next day.

Meanwhile, let me know about whose approach was better. Is it Joanna or Ashish or Rahul? So that Mrs. Rita can declare the class captain of the month.