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# Do Now - PowerPoint PPT Presentation

Do Now . Solve the following… 6 = x + 2 4 = q + 13 23 = b - 19. 5b = 145 -7y = 28 2/3q = 18 1/5x = 2/7. 2-2 Solving Two-Step Equations. Solving using two steps. Step 1: Always add or subtract Step 2: Always multiply or divide To solve, use these steps

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• Solve the following…

• 6 = x + 2

• 4 = q + 13

• 23 = b - 19

• 5b = 145

• -7y = 28

• 2/3q = 18

• 1/5x = 2/7

### 2-2 Solving Two-Step Equations

• Step 1: Always add or subtract

• Step 2: Always multiply or divide

• To solve, use these steps

• Identify the operations and undo them using inverse operations

• 2x + 3 =15

• Step 1: Need to subtract 3 since it is inverse of addition

• 2x + 3 – 3 = 15 -3

• 2x = 12

• Step 2: Need to divide 12 by 2 since it is inverse of multiplication

• 2x/2 = 12/2

• X = 6

• Check Answers by plugging in 2(6) + 3 = 15

• 5 = t/2 – 3

• Step 1: Add 3 to both sides since it is inverse of subtraction

• 5 + 3 = t/s – 3 + 3

• 8 = t/2

• Step 2: Multiply by 2 on both sides since it is inverse of division

• 8 x 2 = t/2 x 2

• Check Answers by pulling in

• 2 + a/4 = -1

• 3n – 4 = 11

• 5x + 12 = -13

• 6 = m/7 - 3

You are making a bulletin board to advertise community service opportunities in you town. You plan to use half a sheet of paper for each ad. You need 5 sheets of construction paper for a title banner. You have 18 sheets of construction paper. How many ads can you make?

Write an equation for this word problem.

1/2a + 5 = 18

Solve

A = 26

Solve with two terms in the numerator service opportunities in you town. You plan to use half a sheet of paper for each

Remember Steps

• X-7 = -12

3

• 6 = x – 2

4

• d – 3 = 6

5

• a + 10 = 4

2

Write and solve this word problem… service opportunities in you town. You plan to use half a sheet of paper for each

Members of a car-sharing program pay a fee of \$50 per month plus \$7.65 for every hour they use a car. A member’s bill was \$149.45 last month. How many hours did the customer use a car last month?

Equation: \$7.65h + 50 = \$149.45

Solution: 13 hours

Study Chapter 1 service opportunities in you town. You plan to use half a sheet of paper for each Vocab: Test Monday!!!!