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Lesson Worksheet: One-step Equations: Addition and Subtraction Mathematics

In this worksheet, we will practice forming and solving equations in one-step using either addition or subtraction, and applying this knowledge to solve word problems.


Write an equation to determine the value of 𝑥 and then solve it to find the measure of the third angle in the triangle.

  • A𝑥+140=180, 320
  • B𝑥+140=180, 40
  • C𝑥+30=90, 60
  • D𝑥+140=360, 220
  • E𝑥+30=180, 150

This lesson includes 9 additional question variations for subscribers.

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