Mathematics, 06.10.2019 07:00 jesuscruzm2020

System of equation
4a +9b =8
8a +6c=-1
6b+6c=-1

Answers: 1

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4a + 9b + 0c = 8   ⇒ 4a + 9b + 0c = 8
8a + 0b + 6c = -1 ⇒ 8a + 0b + 6c = -1
0a + 6b + 6c = -1   12a + 9b + 6c = 7
         12a + 9b +   6c = 7 ⇒ 24a + 18b + 12c = 14
4a + 9b + 0c = 8    8a + 6b + 12c = 0 ⇒ 24a + 18b + 36c = 0
8a + 0b + 6c = -1 ⇒ 8a + 0b + 6c = -1    -24c = 14
0a + 6b + 6c = -1 ⇒ 0a + 6b + 6c = -1 -24 -24
   8a + 6b + 12c = 0     c = ⁷/₁₂
      6b + 6(⁷/₁₂) = -1
       6b + 3¹/₂ = -1
   - 3¹/₂   - 3¹/₂
   6b = -4¹/₂
      6    6
b = ³/₄
      4a + 9(³/₄) = 8
      4a + 6³/₄ = 8
   - 6³/₄   - 6³/₄
      4a = 1¹/₄
   4    4
      a = ⁵/₁₆
      (a, b, c) = (⁵/₁₆, ³/₄, ⁷/₁₂)

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answer: this is not a question

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Answer from: Quest

answer: 8d

step-by-step explanation:

45+5= 50+5=55+5=60

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System of equation
4a +9b =8
8a +6c=-1
6b+6c=-1...