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1Thv §9.5 More: Solving equations Balance Method
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Wiskunde
Middelbare school
havo, vwo
Leerjaar 1
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Slide 1 - Slide
Slide 2 - Slide
1Thv §9.5 More: Solving equations Balance Method
Some more useful PRACTICE for the coming 2 test
follows now!
Make a good use of this by
+ opening your Notebook and
+ making the tasks!
Slide 3 - Slide
Example 1:
Solve: (by writing down the STEPS that you learnt!)
-5c + 24 -3c = 28
Slide 4 - Slide
Example 1 - SOLUTION:
Solve: (by writing down the STEPS that you learnt!)
-5c + 24 -3c = 28 Take the LIKE TERMS together.
-8c + 24 = 28 Subtract 24 from both sides.
-8c = 4 Divide by -8
c = 4 : -8
c = - 0.5
Slide 5 - Slide
Task 1:
Copy and Solve it in your Notebook
with the BALANCE Method. Step by step!
Solve:
5 t + 15 = 25
timer
1:30
Slide 6 - Slide
SOLUTION Task 1:
With the BALANCE Method.
Solve:
5 t + 15 = 25 Subtract 15 on both sides.
5 t = 10 Divide by 5 on both sides.
t = 2
Slide 7 - Slide
Example 2:
Solve: 4 (f + 3) = 12 Let us write a times sign:
4 x (f + 3) = 12 We divide by 4 on both sides.
f + 3 = 3 We subtract 3 on both sides.
f = 0
Slide 8 - Slide
Slide 9 - Slide
Task 2:
Copy and Solve in your Notebook: 7 (t - 9) = 21
timer
1:00
Slide 10 - Slide
Task 2:
Solve: 7 (t - 9) = 21 Add a times sign.
7 x (t - 9) = 21 Divide by 7 on both sides.
t - 9 = 3 Add 9 on both sides.
t = 12
Slide 11 - Slide
TASK 3
Copy and Solve:
12 v - 24 - 14v = 6
timer
1:30
Slide 12 - Slide
SOLUTION TASK 3
Copy and Solve:
12 v - 24 - 14v = 6 Take the LIKE TERMS together.
- 2 v - 24 = 6 Add 24 on both sides.
- 2 v = 30 Divide by - 2.
v = - 15
Slide 13 - Slide
Homework time!
After all this practicing together now
work on your own!
Slide 14 - Slide
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