Question

What is the answer to 4n − -21 = 77?

Answer 1

Hey there!

The value of
`n` is unknown so, let's solve this equation, shall we?

Firstly, we have to
`subtract` by the number
`21` on each of your sides of your equation

Like this:

`4n +`
`21`
`-21`
`=`
`77-12`

Cancel out:
`21-21` because it gives you the result of
`0`

Keep:
`77-21` because it helps us solve for
`n` so,
`77-21`
`= 56`

Our problem becomes:

`4n`
`=56`

Secondly, we have
`divide` by the number of
`4` on each sides of the equation

Like this:

`(4n)/(4)`
`=`
`(56)/(4)`

Cancel out:
`(4n)/(4)` because that gives you the result of
`1`

Keep:
`(56)/(4)` because this gives you the result of
`n`;
`(56)/(4)`
`= 14`

Therefore, the value of the unknown variable is
`14`

`n=`
`14`

Good luck on your assignment and enjoy your day!

~
`LoveYourselfFirst:)`