Question

a number twice of with decreased by 7 gives 55 is his​

Answer 1

Answer:

31

Step-by-step explanation:

let x be the unknown number

now ATQ ,

2x-7 =55

2x =55+7

2x =62

x =62/2

therefore x is 31

Answer 2

Twice of 31 decreased by 7 gives 55​

Given : A number twice of which decreased by 7 gives 55​

To Find  :  The number

Solution:

Assume that Number is N

Twice of Number = 2N

Decreased by 7  Hence  2N - 7

Gives 55

Hence Equate with 55

=> 2N - 7 = 55

=> 2N = 55 + 7

=> 2N = 62

=> N = 31

Hence twice of 31 decreased by 7 gives 55​

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