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:

$\frac{4n}{4}$ $=$ $\frac{56}{4}$

Cancel out: $\frac{4n}{4}$ because that gives you the result of $1$

Keep: $\frac{56}{4}$ because this gives you the result of $n$; $\frac{56}{4}$ $= 14$

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

$n=$ $14$

Good luck on your assignment and enjoy your day!

~$LoveYourselfFirst:)$