## A-REI.1 (Mathematics)

Standard Identifier:

**A-REI.1**
Content Area:

**Mathematics**
Grade Range:

**7–12**
Domain:

**Reasoning with Equations and Inequalities**
Discipline:

**Algebra I**
Conceptual Category:

**Algebra****Cluster**:

Understand solving equations as a process of reasoning and explain the reasoning. [Master linear; learn as general principle.]

**Standard**:

Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.

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