This math topic comprises problems involving solving linear equations with one unknown, represented as a symbol (a circle) within three-term equations. Each question presents an equation containing a multiplication of the unknown, combined either with addition, subtraction, or division. Students determine the correct value of the unknown that satisfies the equation using algebraic manipulation skills. The level of difficulty appears to cater to beginners in algebra concepts, as it's an introduction to basic algebraic principles and solving simple linear equations.
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What number can be put in the circle to make this equation correct?