This math topic focuses on basic algebraic concepts, specifically solving simple linear equations where students find the unknown variable represented by a circle (\bigcirc). The problems present equations with three terms, requiring students to manipulate the equations to isolate and solve for the symbol representing the unknown. Each problem offers multiple-choice answers, giving students an opportunity to practice solving equations and choosing the correct value based on their calculations. This topic ultimately aims to build foundational skills in algebra by solving for variables in straightforward contexts.
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What number can be put in the circle to make this equation correct?