Question

If 5% of x+3/10=20 then the value of x is​

Answer 1

Answer:

3997

Step-by-step explanation:

in the picture it's calculation is done

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Answer 2

Answer:

Required value of x is 394.

Step-by-step explanation:

Given,

$5\% \: of \: x + \frac{3}{10} = 20$

We know,

$a\% \: of \: b = \frac{a}{100} \times b$

So,

$5\% \: of \: x + \frac{3}{10} = 20 \\ \frac{5}{100} \times x + \frac{3}{10} = 20 \\ \frac{1}{20} \times x + \frac{3}{10} = 20 \\ \frac{x}{20} + \frac{3}{10} = 20 \\ \frac{x + 2 \times 3}{20} = 20 \\ \frac{x + 6}{20} = 20 \\ x + 6 = 20 \times 20 \\ x + 6 = 400 \\ x = 400 - 6 \\ x = 394$

Therefore required value of x is 394.

This is a problem of Algebra.

Some important Algebra formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Know more about Algebra,

1) https://brainly.in/question/13024124

2) https://brainly.in/question/1169549