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How to do equations

How to do equations

Assessment

Presentation

Mathematics

7th - 8th Grade

Hard

CCSS
8.EE.C.7B, 7.EE.B.4A, 6.EE.B.7

Standards-aligned

Created by

Blake Heiner

Used 6+ times

FREE Resource

6 Slides • 8 Questions

1

How to Equation

Keep Calm and Combine Like Terms

Slide image

2

 5x13+13x+4 =5-5x-13+13x+4\ =5  

Step 1 = Keep Calm and Combine Like Terms

3

 -5x-13+13x+4\ =5  
 (5x+13x)+(13+4)=5\left(-5x+13x\right)+\left(-13+4\right)=5  
 7x9=57x-9=5  

This is what that looks like

4

Multiple Choice

Your turn...

 2x11+11x+6=32x-11+11x+6=-3  

1

 9x+17=3-9x+17=-3  

2

 13x5=313x-5=-3  

3

 2x+6=32x+6=-3  

5

Multiple Choice

One more...

 5+13x99x=25+13x-9-9x=-2  

1

 18x=218x=-2  

2

 18x18=218x-18=-2  

3

 4x4=24x-4=-2  

6

 7x-9=5  
 9+(7x9)=(5)+99+\left(7x-9\right)=\left(5\right)+9  

  7x = 147x\ =\ 14  

Next take care of your constant
Just do the opposite of what it currently is to both sides

7

Multiple Choice

Your turn...  

 13x5=313x-5=-3  

1

 13x=813x=-8  

2

 13x=213x=2  

3

 8x=38x=-3  

8

Multiple Choice

One more...

 4x4=24x-4=-2  

1

 4x=64x=-6  

2

 4x=24x=2  

3

 x=2x=-2  

9


 7x=147x=14   


 (7x)7=147\frac{\left(7x\right)}{7}=\frac{14}{7}  

 x=2x=2  

Now take care of the coefficient
Use the inverse operation of what's currently happening

10

Multiple Choice

Your turn...

 13x=213x=2  

1

 x=15x=15  

2

 x=11x=11  

3

 x=213x=\frac{2}{13}  

11

Multiple Choice

One more...

 4x=24x=2  

1

 x=2x=2  

2

 x=2x=-2  

3

 x=12x=\frac{1}{2}  

12

Lets put it all together

 4x+11x4=104x+11-x-4=-10  

Step 1  3x+7=103x+7=-10  
Step 2  3x=173x=-17  
Step 3  x=173x=-\frac{17}{3}  

13

Open Ended

Your turn...

Solve for x


 8x75x+5=10-8x-7-5x+5=10 

14

Open Ended

One more...

Solve for x


 1+2x+9+7x=81+2x+9+7x=8  

How to Equation

Keep Calm and Combine Like Terms

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