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Linear Equation in One Variable 1
Linear Equation in One Variable
NG YIT [email protected]
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 y31x9)1(3 x
343)1(
xx
63 zz127 oo
Linear Equation in One Variable 7
compare these two equatuons
• Try to compare these two equatuons
514 51x
with value
with unknown
Linear Equation in One Variable 8
51x
• 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
1x 511x 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 x15 x
4x
51x 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 x4x
51x (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 633x
36
x 2
Linear Equation in One Variable 15
Multiplication and Division
• Example 1
Linear Equation in One Variable 16
Try These
x53
93 x
953
x
25
3x
Linear Equation in One Variable 17
Mixed operation
• Example 1
Linear Equation in One Variable 18
Try these