Unit 5: Lesson 4 and 5

Solving 1 step equations

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Slide 1: **Slide**

7th Grade

This lesson contains **14 slides**, with **interactive quizzes** and **text slides**.

Unit 5: Lesson 4 and 5

Solving 1 step equations

Does the variable have to stand for something when we write an expression/equation? explain

simplify the following expression

3x +5x

3x +5x

A

8x2

B

8+2x

C

8

D

8x

simplify the following expression

7(10c)

7(10c)

A

17c

B

7+10c

C

70c

D

-3c

simplify the following expression

1/2(2x+2)

1/2(2x+2)

A

x+1

B

2 1/2 +2x

C

x+2

1 step equations

1 step equations are equations that, when simplified, have only 1 operation

ex: x + 3 = 5 5z = 10

y-9 =11 n/6 = 21

Solving 1 step equations

Operations are step up in pairs that work together.

Multiplication/division Addition/Subtraction

the operations are opposites of each other, one undoes what the other does

Inverse Operations

Ex. 2 x 4 = 8.... 8 / 4 = 2 division undoes multiplication and you end up with your original number

Ex. 6-4 = 2 2+4 = 6 addition undoes subtraction and you end up with your original number

Therefore these are INVERSE OPERATIONS! -Inverse operations are operations that undo each other

Inverse Operations

We use inverse operations to solve 1 step equations

Example: x-2 = 3

This is a GAME!

To win: always get the variable on 1 side and numbers on the otherExample: y + 5 =10

Example: 2c = 265

Example: u/4 =7

There is no quiz for Lesson 5