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Equations – Success if you can do these

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1 Equations – Success if you can do these
3x = 6 4x + 2 = 3x + 7 x/4 = 2 5x – 3 = 7 + 3x x + 3 = 17 3(x + 2) = 12 x – 4 = 13 4(x + 5) = 32 3x + 4 = 25 3(2x – 2) = 2(x + 6) 4x – 3 = 17 4(3x + 5) = 2(x + 15)

2 How to solve the 5x = 20 type of equation
5 and 20 can be any number

3 5x = 20 means 5 X x = 20 5x = 20 5 X x = 20

4 So, you get rid of the 5 X by ÷ 5
5x = 20 means 5 X x = 20 So, you get rid of the 5 X by ÷ 5 5x = 20 5 X x ÷ 5 = 20 ÷ 5

5 So, you get rid of the 5 X by ÷ 5
5x = 20 means 5 X x = 20 So, you get rid of the 5 X by ÷ 5 5x = 20 5 X x ÷ 5 = 20 ÷ 5 x = 4

6 5x = 20 means 5 X x = 20 So, you get rid of the 5 X by ÷ 5 5x = 20 5 X x ÷ 5 = 20 ÷ 5 x = 4 But you must divide both sides by 5

7 just divide both sides by the number that multiplies the x.
For equations like 5x = 20 just divide both sides by the number that multiplies the x. 5x = 20 x = 20 ÷ 5 x = 4 Like this

8 How to solve the x/3 = 4 type of equation
The 3 and 4 can be any number

9 It means x ÷ 3 = 4 x/3 = 4 x ÷ 3 = 4

10 x/3 = 4 x ÷ 3 = 4 x ÷ 3 X 3 = 4 X 3 X 3 It means x ÷ 3 = 4 Get rid of
÷ 3 by using a X 3

11 x/3 = 4 x ÷ 3 = 4 x ÷ 3 X 3 = 4 X 3 x = 12 X 3 It means x ÷ 3 = 4
Get rid of ÷ 3 by using a X 3

12 x/3 = 4 x ÷ 3 = 4 x ÷ 3 X 3 = 4 X 3 x = 12 X 3 It means x ÷ 3 = 4
Get rid of ÷ 3 by using a X 3 You must X 3 on both sides

13 just multiply both sides by the number that divides the x.
For equations like x/3 = 4 just multiply both sides by the number that divides the x. x/3 = 4 x = 4 X 3 x =12 Like this

14 Try these 1 2x = 16 7 x/4 = 2 2 3x = 21 8 x/2 = 3 3 5x = 35 9 x/4 = 5
10 x/5 = 6 5 2x = 7 11 x/8 = 7 6 5x = 12 12 x/9 = 10

15                               Remember, always do the same thing to both sides. Felix is checking that you do this properly. x/3 = 12 x ÷ 3 X 3 = 12 X 3 x =36


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