100 Large Print Word Search Puzzles for Seniors: Brain Health Boosting that is fun and exciting

100 Large Print Word Search Puzzles for Seniors: Brain Health Boosting that is fun and exciting

Matematika 18. Diketahui [3x-y = 14 2x+3y=2 Nilai x - y adalah ​

18. Diketahui [3x-y = 14 2x+3y=2 Nilai x - y adalah ​

Penjelasan dengan langkah-langkah:

3x - y = 14 |×3

2x + 3y = 2 |×1

__

9x - 3y = 42

2x + 3y = 2

___________+

11x + 0 = 44

11x = 44

x = 44/11

x = 4

substitusi

3x - y = 14

3.4 - y = 14

12 - y = 14

-y = 14 - 12

-y = 2

y = -2

nilai x - y

= x - y

= 4 - (-2)

= 4 + 2

= 6

Nilai dari x - y adalah 6

Langkah langkah

3x - y = 14

2x + 3y = 2

x - y = ...

Eliminasi

3x - y = 14 | ×3 |

2x + 3y = 2 | ×1 |

9x - 3y = 42

2x + 3y = 2

____________+

11x = 44

x = 44/11

x = 4

Subsitusi

3x - y = 14

3(4) - y = 14

12 - y = 14

-y = 14 - 12

-y = 2

y = -2

Nilai dari x - y

= 4 - (-2)

= 4 + 2

= 6

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