Solving One-Step Equations
Aligned to 6.EE.B.7 — Common Core State Standards for Mathematics.
What this lesson teaches
An equation is a balance. Whatever you do to one side, do to the other. To isolate the variable, undo the operation with its inverse.
Worked example
x + 5 = 12 → subtract 5 from both sides → x = 7. Check: 7 + 5 = 12. ✓
Practice questions
- Solve x − 4 = 9.
- Solve 3x = 21.
- Solve x/2 = 6 and check your answer.
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Resolución de Ecuaciones de Un Paso
Una ecuación es como una balanza. Lo que hagas de un lado, debes hacerlo del otro. Para despejar la variable, deshaz la operación usando su operación inversa.
Ejemplo: x + 5 = 12 → resta 5 a ambos lados → x = 7. Comprobación: 7 + 5 = 12. ✓
More Expressions & Equations lessons
Expressions and Exponents6.EE.A.1Writing and Evaluating Expressions6.EE.A.2Making Equivalent Expressions6.EE.A.3Are Two Expressions Equal?6.EE.A.4What It Means to Solve6.EE.B.5Using Variables in Word Problems6.EE.B.6
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