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Video: Solving One-Step Linear Equations

Kathryn Kingham

Solve 𝑥 βˆ’ 67 = 81.


Video Transcript

Solve π‘₯ minus 67 equals 81.

This is a one-step linear equation. Some number minus 67 equals 81. And to find what our π‘₯ is, we’ll need to add 67 to both sides of our equation. Negative 67 plus 67 equals zero. 81 plus 67 equals 148. π‘₯ plus zero would just be equal to π‘₯. And that tells us that π‘₯ equals 148.

To check and make sure we’ve solved this correctly, we can plug in 148 for our π‘₯ value in the original equation. 67 minus 148 [148 minus 67] equals 81, so π‘₯ equals 148.