Question

If you multiply me by 3 and increase that value by 5, I am 20! What’s my number?

Answer 1

Let the unknown number be denoted by the variable x.

Then, now let's convert the word equation into a numerical equation.

So,

3x+5 = 20 is the numerical equation of the given word equation.

Let's solve the equation obtained.

3x+5 = 20.

Transposing 5 to RHS:

3x = 20-5.
3x = 15.

Transposing 3 to RHS:

x = 15/3.
x = 5.

Therefore, the unknown number is 5.

Checking by substituting 5 in place of the variable x:

3(5)+5=20.
15+5=20.
20=20.

Hence, we confirmed that the value of the unknown number is 5.

Answer 2

$\large{\bold{Solution:}}$

.

$\underline{\textit{\textbf{Let the unknown number be x}}}$

Now, simply form an equation according to the question and then solve $x.$

⇒ If you multiply me by 3 = $\textbf{3x}$

⇒ Increase that value by 5 = $\textbf{+5}$

⇒ I am 20 = $\textbf{20}$

.

.

$\underline{\textit{\textbf{Equation formed :—}}}$

= > $\textbf{3x + 5 = 20}$

= > $\textbf{3x = 20 – 5}$

= > $\bold{\fbox{x = 5}}$

.

.

$\underline{\textit{\textbf{Let's verify it by replace the unknown x by the number 5 :—}}}$

= > $\bold{3 \times 5 + 5 = 20}$

$\textbf{= 15 + 5}$

$\textbf{= 20}$

Hence, verified!

.

.

$\textbf{Therefore, the required number is 5.}$

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$\bold{\fbox{Hope\:It\:Works\:!!!}}$
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