Question

1) if we add 7 to twice a number we get 49 find the number?
2) if we subtract 22 from three times of number we get 68 find the number?​

Answer 1

Step-by-step explanation:

$1. \: \: let \: the \: no. \: be \: x \\ \\ given \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ 7is \: added \: twice \: to \: a \: number \\ => 7 + (x \times x) = 7 + 2x \\ so \\ = > 7 + 2x = 49 \\ = > 2x = 49 - 7 \\ = > 2x = 42 \\ = > x = \frac{42}{2} \\ = > x = 21 \\ \\ hence \: the \: number \: is \: = 21 \\ \\ \\ \\ \\ 2. \: \: let \: the \: no. \: be \: x \\ given \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ 22 \: is \: subtracted \: three \: times \: \\ from \: a \: no. \\ = > (x \times x \times x) -22= 3x -22\\ \\ so \\ = > 22 - 3x = 68 \\ = > 3x = 68 +22 \\ = > 3x = 90 \: \: \: \: \: \: \: \: \: \: \\ = > x = \frac{90}{ 3} \\ = > x = 30 \\ \\ \\ \\ \\ hence \: the \: number \: is \: 30$

i hope it may help you..

☺️☺️

Answer 2

Answer:

1. 21

2.15.33

Step-by-step explanation:

1.Let the number be x.

ATQ,

 2x + 7 =49

=>2x=49-7

=>2x=42

=>x=21

2.Let the number be x.

ATQ,

3x - 22 = 68

=> 3x=46

=>x=15.33