Equation: A math sentence that says that 2 expressions are equal., 3x + 9 = 15, 5x – 3 = 7, Expression: A combination of variables, numbers, and at least one operation., 7b + 4, 6x - 2, Operation: The symbol representing a mathematical operation, ➕ ➖, ➗, Term: A number, variable, or number and variable together in an expression, x, -9y, 18b2, 4, -5, m, 3t2, Coefficient: The number multiplied by a variable, The -8 in -8x, The 3 in 3w,

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