Correct answer: D.
- Define the variable: Let = the number of students the class started with.
- Write the equation: Starting number plus 8 equals 31: .

MA.6.AR.2.2 · Algebraic Reasoning
Students write and solve one-step equations in one variable using addition and subtraction, where all terms and solutions are integers. They solve equations like x + 7 = 12 by using inverse operations, and they write their own equations from real-world situations such as spending or earning money.
The FAST tests this with equation editor items where students solve for the variable and multiple choice items asking which equation models a given word problem.
These come straight from Algebro's question bank. Pick an answer to check it instantly.
Correct answer: D.
Enter the number only. Do not include units like $, %, or ft²
Correct answer:
Correct answer: A.
Correct answer: B. ; started at
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