初中数学英文 练习Objective - To solve simple equations involving addition and subtraction.Identity Property of Additionadditive identityEquation - A mathematical sentence that shows twoexpressions are equal.=8 + 4 12“fulcrum”Equations must always stay perfectly balanced.Determine which value is the correct solution tothe equation.Addition Property of EqualityIf a = b, then a + c = b + corGiven a = band c = cthen a + c = b + cSubtraction Property of EqualityIf a = b, then a - c = b - corGiven a = band c
