Question

Solve this equation: 3(x + 1) = 15

Answer 1

Step-by-step explanation

Hi there! We're asked to solve the following equation :

⇒ 3(x + 1) = 15

To solve the equation, we need to isolate x - and to do that, we're going to simplify the left side as much as possible.

I'll start by using the distributive property :

⇒ 3 * x + 3 * 1 = 15

⇒ 3x + 3 = 15

The next step is to subtract 3 from both sides :

⇒ 3x = 15 - 3

⇒ 3x = 12

Finally, divide both sides by 3 :

⇒ 3x/3 = 12/3

⇒ x = 4

Our result is:

⇒ x = 4

`\dotfill`

Answer 2

x = 4

Explanation:

given

3(x + 1) = 15 ( divide both sides by 3 )

`(3)/(3)` (x + 1) =
`(15)/(3)` ( simplify both sides )

x + 1 = 5 ( subtract 1 from both sides )

x + 1 - 1 = 5 - 1 , that is

x = 4