Warm ups - simplify

Math Binder

1. Current Notes

2. Old Notes

3. Homework

4. Review Sheets

5. Quizzes/Tests

3-3 Solving Multistep Equations

Objective: To solve equations using add., subt.,

mult., and division.

Examples 1 – 3 (watch & listen)

5n + 6 = -4

-6 -6

5n = -10

5 5

n = -2

17 = 7y + 87 9 65

y

-9 -9

(5) (5)35

y

15y

Examples 4 – 6 (do with me)

0.6 1.5 1.8n 4 83

x

Example 7 – 9 (with a partner)

16

3

d 54 3 30x x 3 1 8y

TOO (Try on your own)

5 94

p 6 31

5

m

Solve.

3( 1) 5 3 2x x 5 2( 3) 7 1x x

Recap with a partner…

1) Explain to your partner how to solve a multi-step equation.

2) Explain how to solve the following equation:

38 11

2a

Homework

Pg. 160 # 17 – 33 odd

Check your answers in the back of the book.

Math Lab

Review today’s lesson Homework Please finish worksheets from last week:

Why did the ant run across the cracker box? What did the Spanish Farmer say to his chicken?

solve two-step equations.

ObjectiveThe student will be able to:

Designed by Skip Tyler, Varina High School

To solve two-step equations, undo the operations by working backwards.

Example:

Ask yourself,

1. What is the first thing we are doing to x?

2. What is the second thing?

Recall the order of operations as you

answer these questions.

• Dividing by 2

• Subtracting 3

3 72

x

To undo these steps, do the opposite operations in opposite order.

1) Solve 2x - 1 = -3

+ 1 + 1

2x = -2

2 2

x = -1

2(-1) - 1 = -3

-2 – 1 = -3

1. Draw “the river”2. Add 1 to both

sides3. Simplify4. Divide both sides

by 25. Simplify6. Check your

answer

+ 4 + 4

3 · · 3

x = 36

12 – 4 = 8

123

x

2) Solve 4 83

x

1. Draw “the river”2. Add 4 to both

sides3. Simplify4. Clear the fraction

-Multiply both sides by 3

5. Simplify6. Check your

answer

364 8

3

Try these on your own...

The answers...