2.1 Solving Two-Step Equations

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Presentation transcript:

2.1 Solving Two-Step Equations Objective: SWBAT solve multi-step equations in one variable.

Mini Quiz 11 1. Solve x – 3 = -8 2. Solve -24 = 4c 3. Solve

Quick Review 1. What is the goal in solving an equation? To isolate the variable. 2. What do you need to find, to “get rid of” the term? The inverse. 3. When do you use the Additive Inverse? When it’s adding or subtracting. 4. When do you use the Multiplicative Inverse? When it’s multiplying or dividing.

Solving 2-steppers Let’s “move in” on “x”! Our goal is to get “x” (the variable) by itself 1. 7 = 2y – 3 + 3 + 3 10 = 2y 2 2 5 = y Let’s “move in” on “x”!

Solving 2-Steppers Our goal is to get “x” (the variable) by itself 4. 5. 5 3 -27 32

More 2-Steppers 6. 7. 8. 9. 43 2 25 -28

Writing Equations to Solve 10. Suppose you are helping to prepare a large meal. You can peel 2 carrots per minute. You need 50 peeled carrots. How long will it take you to finish if you have already peeled 16 carrots? 2m + 16 = 50

Writing Equations to Solve 11. A state park charges admission of $6 per person plus $3 for parking. Jo paid $27 when her car entered the park. Write and solve an equation to find the number of people in Jo’s car. 6p + 3 = 27

Wrap Up 2-Step Equations Write Equation and Solve Goal: Get the variable (x) by itself “move in” on “x” Write Equation and Solve HW P. 72 #1-17 EOO, 29-39 odd, 47-53 odd, 71-77 odd Write a DLUQ and answer the question: What does “solve” mean?