1. Rearranging algebraic Formulae
Use mouse click after each slide

2. Example1 H=8e + 2, Make e the subject of the formulae
Lets see how we got H. . . in H=8e + 2
Start with e
Multiply all by 8 x8
Add 2 +2
We get H
Do the exact opposite to get e . .
We get e
Divide all by 8 ÷8
Subtract 2 -2
Start with H
So e=(H-2)÷8 or e= (H-2) 8
Your turn: Make a the subject of the formula F=6a +5

3. Example 2 V=7(c+9)+ 10, Make c the subject of the formulae
Lets see how we got V. . . In V=7(c+9)+10
Start with c
Add 9 +9
Multiply all by 7 x7
We get V
Add 10
+10
Do the exact opposite to get c . .
We get c
Minus 9 -9
Divide all by 7 ÷7
Start with V
Minus 10
-10
So c=(V-10)÷7 -9 or c= (V-10) - 9 7
Your turn: Make z the subject of the formula F=6(z+9) + 8

4. Example 3 T=(s+4)2+ 3, Make s the subject of the formulae
Lets see how we got T In T=(s+4)2+3
Start with s
Add 4 +4
Squared all
( )2
We get T
Add 3 +3
Do the exact opposite to get s . .
We get s
Minus 4 -4
Square root all √
Start with T
Minus 3 -3
So s=(T-3)√ -4 or s= √(T-3) - 4
Your turn: Make p the subject of the formula F=(p+9)2 + 8

5. Example 4 X =(Y+5) - 6, Make Y the subject of the formulae 7
Lets see how we got X. . .
Start with Y
Add 5 +5
Divide all by 7 ÷7
We get X
minus 6 -6
Do the exact opposite to get Y . .
We get Y
Minus 5 -5
Multiply all by 7 x7
Start with X
Add 6 +6
So Y=(X+6)x7 -5 or Y=7(X+6) - 5
Your turn: Make g the subject of the formula F= (g+9) - 7 5

6. Example 5 T=4(u2+7), Make w the subject of the formulae
Lets see how we got T In T=4(u2+7)
Start with u
Square it u2
Add 7 +7
We get T
Multiply all by 4 x4
Do the exact opposite to get w . .
We get u
Minus 7 -7
Square root
All √
Start with T
Divide by 4
÷ 4
So u=(T÷4 -7)√ or u= T – 7 4
Your turn: Make p the subject of the formula F=5(p2 + 8)

7. Answers 1. Make a the subject of the formula F=6a +5
Restart
1. Make a the subject of the formula F=6a +5
a=(F-5)÷6 or a= (F-5) 6
2. Make z the subject of the formula F=6(z+9) + 8
z=(F-8)÷6 -9 or z= (F-8) - 9 6
3. Make p the subject of the formula F=(p+9)2 + 8
So p=(F-8)√ or p= √(F-8) - 9
4. Make g the subject of the formula F= (g+9) - 7 5
g=(F+7)x5 -9 or g=5(F+7) - 9
5. Make p the subject of the formula F=5(p2 + 8)
So p=(F÷5 -8)√ or p= F – 8 5