7.U5A.L4.5- Solving 1-step equations

• 7th Grade

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

1. 8x​2​​
2. 8+2x
3. 8
4. 8x

simplify the following expression
7(10c)

1. 17c
2. 7+10c
3. 70c
4. -3c

simplify the following expression
1/2(2x+2)

1. x+1
2. 2 1/2 +2x
3. 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 other

Example:   y + 5 =10 

Example: 2c = 265 

Example: u/4 =7

There is no quiz for Lesson 5