Midcontinent Research for Education and Learning
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Common Core Mathematics 912
Cluster
Understand solving equations as a process of reasoning and explain the reasoning
Grade 912
A.REI.1.
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.
A.REI.2.
Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise.