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Mathematics Level 3 Fill in the Blanks

Fill in the Blanks

Test your knowledge of Mathematics Level 3 with this challenging Fill in the Blanks game!

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Indonesia

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Fill in the Blanks

Mathematics Level 3 Fill in the BlanksOnline version

Test your knowledge of Mathematics Level 3 with this challenging Fill in the Blanks game!

by Khoirun Nisak
1

35000 22000 31000 31000 66000 66000 3y 31000

Harga 1 buah buku dan 3 pena adalah Rp . 22 . 000 . Sedangkan harga 3 buku dan 2 pena adalah Rp . 31 . 000 . Berapakah harga yang harus dibayar jika ingin membeli 3 buku dan 3 pena ?

Penyelesaian :
? + ? ? ? ? ? ? = Rp . 22 . 000
x + = . . . . . . . . . . . persamaan 1
? ? ? + ? ? ? ? = Rp . 31 . 000
3x + 2y = . . . . . . . . . . persamaan 2

Langkah 1 : eliminasi x pada persamaan 1 dan 2
x + 3y = 22000 ( ×3 ) 3x + 9y =
3x + 2y = 31000 ( ×1 ) 3x + 2y =
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ( - )
( 3x - 3x ) + ( 9y - 2y ) = -
7y =
y = 35000 : 7
y = 500 0

2

15000 5000 22000 22000 700 15000

Langkah 2 : substitusikan y = 5000 terhadap persamaan 1
x + 3y = 22000
x + 3 ( ) =
x + =
x = 22000 -
x =

3

21000 15000 36000

Tentukan harga 3 buku dan 3 pena
? = Rp 7 . 000 , 00
? ? = Rp 5 . 000 , 00
3 ? + 3 ? ? = 3x + 3y
= 3 ( 7000 ) + 3 ( 5000 )
= +
=
Jadi harga 3 buku dan 3 pena adalah Rp 3600 0

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