equation, statement to show that two expressions are equal, inverse, opposite effect of, expression, collection of terms involving variables and numbers, unknown, value not yet known, indicated with a letter and used in an equation or inequality, solution, value of an unknown that satisfies an equation or inequality, coefficient, number in front of a variable indicating the multiple of the variable, integer, whole number that can be positive or negative, inequality, mathematical statement that shows the relationship between two expressions where one is greater than, less than, or not equal to the other, satisfy, find a value that makes the inequality true when substituted into the inequality, compound inequality, inequality that combines two simple inequalities, such as 2 < g < 5, solve, find the value(s) or set of values of an unknown in an equation or inequality, set notation, system to represent and describe collections of elements using symbols, solution set, range of values which satisfy an inequality, union, elements that belong to both or either set, formula, mathematical rule or equation that shows the relationship between different variables or quantities, subject, variable that is isolated on one side of the formula, rearrange, adjust a formula to isolate a specific variable or simplify an expression, variable, symbol, usually a letter, that can represent any value in mathematical expressions, identities and formulae, expand, multiply each term inside the bracket by the expression outside the bracket, factorise, express an algebraic expression as a product of its factors using brackets, the reverse process of expanding brackets

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