Select the correct answer.

D.

To solve the equation , first, combine the terms involving : . Next, add 4 to both sides to get . Finally, divide by 21, yielding . So neither A, B, C, nor D are correct in this output.

Now let’s dig deeper into solving equations!

The importance of balancing equations can’t be overstated - it’s like a tightrope walk! When you add, subtract, multiply, or divide anything on one side, you must do the same to the other side to keep everything balanced. Get into the habit of double-checking your work, as it’s super easy to make a small error that leads you astray.

For some great practice, grab a handful of equations from different sources and tackle them! Websites and math workbooks often have a treasure trove of problems. Alternatively, you can join math communities online or even make use of educational apps. The trick is to keep challenging yourself, and who knows? You might end up enjoying the thrill of solving even the trickiest of equations!