Unit 1 Lessons 2&3 Solving Equations by Adding, Subtracting, Multiplying, or Dividing Standards: CC.9-12.A.REI.1, CC.9-12.A.REI.3, CC.9-12.A.CED.1 EQ: How do we solve one-step equations in one variable?

Parts of an Expression

Identify Parts

Inverse Definition: something that is the opposite or reverse of something else. Example: (what is the inverse of….?) 1.Multiplication→_______________ 2.Addition→_______________ 3.Subtraction→_______________ 4.Division→_______________

Properties WORDSNUMBERSALGEBRA Addition Property of Equality: You can add the same number to both sides of an equation and the statement will still be true. 3 = = = 5 a = b a + c = b + c Subtraction Property of Equality: You can subtract the same number on both sides of an equation and the statement will still be true. 3 = = = 1 a = b a - c = b - c Multiplication Property of Equality: You can multiply the same number on both sides of an equation and the statement will still be true. 3 = 3 3(2) = 3(2) 6 = 6 a = b a(c) = b(c) Division Property of Equality: You can divide both sides of an equation by the same number and the statement will still be true.

Solve the equation and tell me what property you used to solve.

Solve the following One-Step equations for x

PEMDAS

Multi-Step Equations When solving for a variable, you must get it ALONE on one side of the equal sign. To get a variable by itself, you have to do PEMDAS backwards. PEMDASSADMEP

Examples

Assignment One Step – Page 16: (EVEN) – Page 23: (EVEN) QUIZ next class!!