Question

If 7 is subtracted from 4 times a number, the
result is 9. Find the number.​

Answer 1

Answer :-

• The required number is 4.

Given :-

• If 7 is subtracted from 4 times a number, the result is 9.

To find :-

• The number.

Step-by-step explanation :-

• Let the number be x.

• Four times the number = 4x.

• Subtracting 7 from 4 times the number, we get 4x - 7.

• The result is 9.

$\rm\implies 4x - 7 = 9$

Transposing 7 from LHS to RHS, changing it's sign,

$\rm \implies 4x = 9 + 7$

On simplifying,

$\rm \implies 4x = 16$

Transposing 4 from LHS to RHS, changing it's sign,

$\rm \implies x = \dfrac{16}{4}$

Dividing 16 by 4,

$\rm\implies x = 4.$

• The value of x is 4.

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• Hence, the number is 4.