Sarthaks Test
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Choose the correct one. 

Which of the following equations cannot be formed using the equation x = 7 ? 

(a) 2x + 1 =15 (b) 7x – 1 = 50 

(c) x – 3 = 4 (d)  x/7 – 1 = 0

2 Answers

+1 vote
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Best answer

Correct option is (b) 7x - 1 = 50

We have, x = 7

On multiplying both the sides by 7, we get

7×x=7×7

7x = 49

On adding (-1) both the sides, we get

7x + (-1) = 49 + (-1)

7x - 1= 49 - 1

7x - 1 = 48

+2 votes
by (18.2k points)

Correct answer is (b) 7x – 1 = 50 

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