Question

Selma asked Veda to think of a number. Then she asked to double it and add 5 to it. If the result was 21,

what number did Veda think?​

Answer 1

✪ Question ✪

Selma asked Veda to think of a number. Then she asked to double it and add 5 to it. If the result was 21, what number did Veda think?

✪ Given ✪

5 added to double the number Veda thought gives 21.

✪ To find ✪

The number.

✪ Solution ✪

Let the number be x.

According to condition,

2x + 5 = 21

↝2x = 21 - 5

↝2x = 16

↝x = 16/2

↝x = 8

✪ Hence ✪

x = 8

✪ Therefore ✪

Veda thought of the number 8.

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✪ Verification ✪

2x + 5 = 21

↝2×8 + 5 = 21

↝16 + 5 = 21

↝21 = 21

So, L.H.S = R.H.S.

Hence, verified.

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