NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 7: Algebra - Multiple Choice Questions
Question 23

Question. 23

I think of a number and on adding 13 to it, I get 27. The equation for this is

(A)

x – 27 = 13

(B)

x – 13 = 27

(C)

x + 27 = 13

(D)

x + 13 = 27

Detailed Answer with Explanation:

Step 1: Let the number be (x).

Step 2: “Adding 13 to it” means we do:
(x + 13)

Step 3: “I get 27” means the result is equal to 27:
(x + 13 = 27)

So, the correct equation is:
(x + 13 = 27)

Why the other options are not correct?

(x - 27 = 13) → this means subtracting 27, not adding 13.
(x - 13 = 27) → this means subtracting 13, not adding 13.
(x + 27 = 13) → here the total is 13, but the question says the total is 27.