Introduction to Algebra

Subject: Math  ·  Grade level: 7th

Variables, expressions, and solving simple equations like 2x + 3 = 11.

In this lesson

• Variables & expressions
• Solving one-step equations
• Two-step equations

Key terms

Variable

A letter representing an unknown number.

Coefficient

The number multiplied by a variable. In 3x, the coefficient is 3.

Constant

A fixed number with no variable, like 5.

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