100 Things Virginia Tech Fans Should Know & Do Before They Die (100 Things...Fans Should Know)

100 Things Virginia Tech Fans Should Know & Do Before They Die (100 Things...Fans Should Know)

Matematika bantu jawab ya kakak kakak​

bantu jawab ya kakak kakak​

Jawab:

1. 20

2. 10

Penjelasan dengan langkah-langkah:

dapat diambil beberapa persamaan, yaitu :

  • -a + 4 = 7
  • 4a + 2b = 8

untuk mencari a dapat :

1. -a + 4 = 7

  4(-3) + 2b = 8

  2b = 20

2. a = 4 - 7 = -3

   -12 + 2b = 8

   b = 10

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