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Linear Equation in One Variable 1
Linear Equation
in One Variable
NG YIT HOE
fido_ng87@yahoo.com
018-9095766
Linear Equation in One Variable 2
What is Linear Equation
• What is Linear Equation
• What is Variable
Linear Equation in One Variable 3
Linear Equation in One Variable
• A linear equation is an equation for a straight
line
• In form of where a and b are real
number and x is variable
bax +
23 +x
Linear Equation in One Variable 4
What is this?
E
Linear Equation in One Variable 5
If use Orange?
O
Linear Equation in One Variable 6
Linear Equation in One Variable
cont...
• There is only one unknown value, usually using
,
• For examples ,
x
03 =− y31=−x
9)1(3 =−x
34
3
)1(
+=
−
x
x
63 += zz
127 −= oo
Linear Equation in One Variable 7
compare these two equatuons
• Try to compare these two equatuons
514 =+51=+x
with value
with unknown
Linear Equation in One Variable 8
51=+x
• Left - hand side = Right -hand side
Linear Equation in One Variable 9
• What will if put x+1, 5 to the balance
scale?
Balance scale
1+x 511−+x 15 −
What will if adding -1 to the both sides
balance scale?
x 4
Result?
Linear Equation in One Variable 10
Addition and Subtraction
1511 −=−+x
15 −=x
4=x
51=+x Balance
• Left - hand side = Right - hand side
by adding 1 to both sides
Linear Equation in One Variable 11
Addition and Subtraction ...
• Left - hand side = Right -hand side
15 −=x
4=x
51=+x (ignore 1 step)
check the symbol.
when shifting cause
+ become -
Linear Equation in One Variable 12
Try these
4334 +=− xx
4213 −=− xx
xxxx 315659 −−=−−
Linear Equation in One Variable 13
Multiplication and Division
• Example 1
Linear Equation in One Variable 14
balance scale
• How to put to the balance
scale?
x3 6
3
3x
3
6
x 2
Linear Equation in One Variable 15
Multiplication and Division
• Example 1
Linear Equation in One Variable 16
Try These
x53 =
93 =x
9
5
3
=
x
2
5
3
=
x
Linear Equation in One Variable 17
Mixed operation
• Example 1
Linear Equation in One Variable 18
Try these

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Linear Equation in one variables 3

  • 1. Linear Equation in One Variable 1 Linear Equation in One Variable NG YIT HOE fido_ng87@yahoo.com 018-9095766
  • 2. Linear Equation in One Variable 2 What is Linear Equation • What is Linear Equation • What is Variable
  • 3. Linear Equation in One Variable 3 Linear Equation in One Variable • A linear equation is an equation for a straight line • In form of where a and b are real number and x is variable bax + 23 +x
  • 4. Linear Equation in One Variable 4 What is this? E
  • 5. Linear Equation in One Variable 5 If use Orange? O
  • 6. Linear Equation in One Variable 6 Linear Equation in One Variable cont... • There is only one unknown value, usually using , • For examples , x 03 =− y31=−x 9)1(3 =−x 34 3 )1( += − x x 63 += zz 127 −= oo
  • 7. Linear Equation in One Variable 7 compare these two equatuons • Try to compare these two equatuons 514 =+51=+x with value with unknown
  • 8. Linear Equation in One Variable 8 51=+x • Left - hand side = Right -hand side
  • 9. Linear Equation in One Variable 9 • What will if put x+1, 5 to the balance scale? Balance scale 1+x 511−+x 15 − What will if adding -1 to the both sides balance scale? x 4 Result?
  • 10. Linear Equation in One Variable 10 Addition and Subtraction 1511 −=−+x 15 −=x 4=x 51=+x Balance • Left - hand side = Right - hand side by adding 1 to both sides
  • 11. Linear Equation in One Variable 11 Addition and Subtraction ... • Left - hand side = Right -hand side 15 −=x 4=x 51=+x (ignore 1 step) check the symbol. when shifting cause + become -
  • 12. Linear Equation in One Variable 12 Try these 4334 +=− xx 4213 −=− xx xxxx 315659 −−=−−
  • 13. Linear Equation in One Variable 13 Multiplication and Division • Example 1
  • 14. Linear Equation in One Variable 14 balance scale • How to put to the balance scale? x3 6 3 3x 3 6 x 2
  • 15. Linear Equation in One Variable 15 Multiplication and Division • Example 1
  • 16. Linear Equation in One Variable 16 Try These x53 = 93 =x 9 5 3 = x 2 5 3 = x
  • 17. Linear Equation in One Variable 17 Mixed operation • Example 1
  • 18. Linear Equation in One Variable 18 Try these