Question

Is 4 a solution of 5(2 – x) = –10? Show work to justify your

answer​

Answer 1

yes 4 is a solution of given equation

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Answer 2

Answer:

Yes 4 is solution of 5(2 – x) = –10.

Step-by-step explanation:

Given equation is $5(2 - x) = - 10$

Here solution is also given.

We need to justify the answer.

So,$5(2 - x) = - 10$

We are removing first bracket,

$5 \times 2 - 5 \times x = - 10 \\ 10 - 5x = - 10$

We are separating variable and constant part,

$- 5x = - 10 - 10 \\ - 5x = - 20 \\ 5x = 20 \\ x = \frac{20}{5} \\ x = 4$

In the question,it is given that solution of the given equation is 4.

And now it is prove that 4 is solution of 5(2 – x) = –10.

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

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