Can you please explain how to do this equation, thanks

x+9+12 = -3

x+9+12 = -3

We need to get the known numbers on one side of the equation. To do this we have to subtract the known numbers from both sides.

x + 9 + 12 - 9 - 12 = -3 -9 -12
x = -24

Check it by substituting -24 for x.

Thank you Ms. Sue :-)

Of course! To solve the equation x + 9 + 12 = -3, you need to isolate the variable x on one side of the equation.

Step 1: Combine like terms on the left side of the equation.
x + 9 + 12 simplifies to x + 21, so the equation becomes x + 21 = -3.

Step 2: Move the constant term to the right side of the equation.
To do this, subtract 21 from both sides of the equation.
x + 21 - 21 = -3 - 21
This simplifies to x = -24.

So, the solution to the equation x + 9 + 12 = -3 is x = -24.