Question

X - 3= -21 This is so confusing:(​

Answer 1

Answer:

x = -18

Step-by-step explanation:

x - 3 = -21

add 3 to both sides

x - 3 + 3 = -21 + 3

x = -18

sidenote: you can add anything to both sides of an equation, and it'll still be true. for example, 2 = 2, if you add 1 to both sides you get 3=3 which is still true.

Answer 2

Answer:

$\huge\boxed{x=-18}$

Step-by-step explanation:

In order to solve this, we are trying to find the value of $x$. Basically, $x$ is a placeholder for a number that is unknown. Some number minus 3 is equal to 21.

Our goal is to find $x$. To do this we want to isolate $x$ on one side of the equation

$x-3=-21$

Let's add 3 to both sides.

$x-3 + 3 = -21+3\\\\-3 + 3 = 0\\\\x = -21+3\\\\x=-18$

Hope this helped!