Question

If we add 7to twice a number we get 49then.what is the number​

Answer 1

Let the number be x.

Given,

2x + 7 = 49

2x = 49 - 7

2x = 42

x = 42÷2

=21

Answer 2

Let the required number be n.

Then,

$\bf \: \: \huge \: \: 2n + 7 = 49 \\ \\ \leadsto \frak{ \: 2n = 49 - 7} \\ \\ \leadsto \frak{ \:2n = 42} \\ \\ \leadsto \frak{ \: \: \: n = \frac{42}{2} = \red{21 }}$

Hence,

• 21 is the number which when doubled and added to 7 will result as 49.