Datrys Hafaliadau Llinol

Datrys Hafaliadau Llinol
Solving Linear Equations

​TGAU Mathemateg | GCSE Mathematics

​Gweithrediadau Gwrthdro - Gweithrediadau sy'n DADWNEUD ei gilydd Inverse Operations - Operations that UNDO each other

• ​Gweithred gwrthdro ADIO yw TYNNU

  The inverse operation of ADDITION is SUBTRACTION

• Gweithred gwrthdro LLUOSI yw RHANNU

  The inverse operation of MUTIPLICATION is DIVISION

Datrys Hafaliadau | Solving Equations

x + 9 = 15
(- 9) (- 9)

x = 15 - 9
x = 6

​Tynnu 9 o'r ddwy ochr.
Subtract 9 from both sides.

Datrys Hafaliadau | Solving Equations

x - 12 = 21
(+ 12) (+ 12)

x = 21 + 12
x = 33

​Adio 12 i'r ddwy ochr.
Add 12 to both sides.

Multiple Choice

x - 6 = 12

• 24
• 12
• 6
• 18

Match

Match the following

• x + 2 = 5

• x - 2 = 5

• 7 - x = 5

• x - 4 = 0

• x + 4 = 4

x = 3

x = 7

x = 2

x = 4

x = 0

• x = 3

• x = 7

• x = 2

• x = 4

• x = 0

Datrys Hafaliadau | Solving Equations

3x = 24
(÷3) (÷3)

x = 24 ÷ 3
x = 8

​Rhannu'r ddwy ochr hefo 3.
Divide both sides by 3.

Datrys Hafaliadau | Solving Equations

x ÷ 4 = 20
(x4) (x4)

x = 20 x 4
x = 80

Lluosi'r ddwy ochr hefo 4.
Multiply both sides by 4.

Multiple Choice

7x = 56

• 6
• 8
• 9
• 7

Multiple Choice

x ÷ 6 = 4

• 18
• 30
• 24
• 12

Match

Parwch y canlynol

Match the following

• 2x = 12

• x ÷ 2 = 6

• x ÷ 12 = 2

• 3x = 12

• 12 ÷ x = 4

x = 6

x = 12

x = 24

x = 4

x = 3

• x = 6

• x = 12

• x = 24

• x = 4

• x = 3

Dropdown

2x + 3 = 15

2x = ​

Select answer

x = ​

Select answer