Solving One-Step Equations with Subtraction!



Now we are going to be solving one-step equations that involve subtraction!

We are going to use the same methods to solve as we did with equations that were addition problems. Except this time, can you guess what the opposite mathematical operation is going to be? You got it - Addition! We are going to add in order to get the variable by itself!

Here are a few examples!




Example 1

subtraction equations




Example 2

subtraction equations




Example 3

subtraction equations




Ready to try some on your own?

solving equations practice problems

One-step Equations Practice Problems

Solve for the missing variable

1. x - (-7) = -19

2. y - 7 = -21

3. r - (-10) = 21

4. x - 18 = -22

5. y - (-9) = 12

How was it? Did you check your answers by substituting?

Check your answers using the Answer Key!








Answer Key

solving equations answers




Solving Equations Unit

  • Balancing Equations

  • Solving one-step addition equations.

  • Solving one-step equations (subtraction).   You Are Here!

  • Solving one-step multiplication equations.   The next lesson!

  • Solving one-step division equations.

  • Solving two-step equations.

  • Solving Equations with the Distributive Property

  • Solving equations with fractions

  • Solving Literal Equations

  • Solving equations with variables on both sides

  • Writing equations given a word problem






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