Question

If I multiply a number by 4 and then add 5, the answer is 8.find this number

Answer 1

Given :-

• The no. is to be multiplied by 4 and then 5 is to be added.
• Total = 8

To find :-

• The number = ?

Solution :-

Let the no. be x

According to the question,

$\mapsto$ 4x + 5 = 8

$\mapsto$ 4x = 8 - 5

$\mapsto$ 4x = 3

$\mapsto$ x = 3/4

• The no. is 3/4

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Verify :-

$\mapsto\sf{4 \times \dfrac{3}{4} + 5}$

$\mapsto\sf{ \dfrac{12}{4} + 5}$

$\mapsto\sf{ \dfrac{12 + 20}{4}}$

$\mapsto\sf{ \dfrac{32}{4}}$

$\mapsto\sf{ 8}$

Verified.

Answer 2

Question:-

If I multiply a number by 4 and then add 5, the answer is 8.find this number.

Answer:-

• The number is 3/4.

To find:-

• The number

Solution:-

• Let the number be x.

$\implies 4x + 5 = 8 \\ \\ \implies \: 4x = 8 - 5 \\ \\\implies \: 4x = 3 \\ \\ \implies \: x = \frac{3}{ 4}$

• The number is 3/4.

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Verify:-

$\cancel4 \times \frac{3}{ \cancel4} + 5 = 8 \\ \\ 3 + 5 = 8 \\ \\ 8 = 8$

HENCE VERIFIED!!