Lai Lai Math question

[SGM8888K]

The cost of 2 plates and 1 mug is $30. A plate costs twice as much as a mug. What is the cost of a plate?

 

[PikaPika33]

ask the cashier

 

[PapaWith3Kids]

Got include GST? Before 2024 or after?

 

[Neon92]

each plate is $12

 

[SGM8888K]

Got include GST? Before 2024 or after?

 

[SGM8888K]

each plate is $12

Correct

 

[Nitrile]

mug - > 1 units
plate -> 2 units

2 plates and 1 mug -> 5 units

5 units = $30
1 unit = $6

1 plate -> 2 units = 2 x $6 = $12

 

[ZesiMuerte]

Primary school:
Each mug = 1 unit
Each plate = 2 units
2 plates + 1 mug = 2u + 2u + 1u = 5 units

5 units = 30
1 unit = 30 ÷ 5 = 6
Plate = 2 units = $12

Algebra (P6 and above):
Let cost of mug be x
plate = 2x

2x + 2x + x = 30
5x = 30
x = 6

2x = 12

Hence, 1 plate = $12

 

[SGM8888K]

mug - > 1 units
plate -> 2 units

2 plates and 1 mug -> 5 units

5 units = $30
1 unit = $6

1 plate -> 2 units = 2 x $6 = $12

Well explain

 

[Oppa380]

The cost of 2 plates and 1 mug is $30. A plate costs twice as much as a mug. What is the cost of a plate?

2a +b = 30
a = 2b
b = a/2

2a + a/2 = 30
4a + a = 60
5a = 60
a = 12

b=12/2=6

 

[PapaWith3Kids]

The cost of 2 plates and 1 mug is $30. A plate costs twice as much as a mug. What is the cost of a plate?

If you’re preparing for PSLE then please buck up. This is too trivial.

 

[SGM8888K]

Primary school:
Each mug = 1 unit
Each plate = 2 units
2 plates + 1 mug = 2u + 2u + 1u = 5 units

5 units = 30
1 unit = 30 ÷ 5 = 6
Plate = 2 units = $12

Algebra (P6 and above):
Let cost of mug be x
plate = 2x

2x + 2x + x = 30
5x = 30
x = 6

2x = 12

Hence, 1 plate = $12

Well done

 

[Reborn]

how come u ask such math questions?

 

[tyjtht]

This is not forum for 5 years old person.

 

[rider83]

Correct

He didnt include GST leh…. How about shipping fee?

 

[SGM8888K]

Oh my daughter get it wrong , so testing you guys . Very good

 

[lowsesbbfa]

The cost of 2 plates and 1 mug is $30. A plate costs twice as much as a mug. What is the cost of a plate?

I don't know how to do Maths...

 

[Nevereatrice]

Tml go school early to copy?

 

[lowsesbbfa]

Oh my daughter get it wrong , so testing you guys . Very good

Chiur daughter WLWLSMDWL...

 

[PapaWith3Kids]

Chiur daughter WLWLSMDWL...

No lar, P4 only is it?