Math, asked by praneeysunny, 26 days ago

4g+8f+c+13=0 ,2g+3f+c+25=0,g+f+c+1=0 find it fast ?


Answers

Answered by MrImpeccable
41

ANSWER:

Given:

  • 4g + 8f + c + 13 = 0
  • 2g + 3f + c + 25 = 0
  • g + f + c + 1 = 0

To Find:

  • Value of g, f and c

Solution:

We are given that,

⇒ 4g + 8f + c + 13 = 0 --------(1)

⇒ 2g + 3f + c + 25 = 0 --------(2)

⇒ g + f + c + 1 = 0 --------(3)

Equating (1) and (3),

⇒ 4g + 8f + c + 13 = g + f + c + 1

Cancelling c,

⇒ 4g + 8f + 13 = g + f + 1

⇒ 3g + 7f + 12 = 0 --------(4)

Equating (1) and (2),

⇒ 4g + 8f + c + 13 = 2g + 3f + c + 25

Cancelling c,

⇒ 2g + 5f - 12 = 0 --------(5)

Multiplying (4) by 2 and (5) by 3,

⇒ 3g + 7f + 12 = 0

⇒ 6g + 14f + 24 = 0 --------(6)

And,

⇒ 2g + 5f - 12 = 0

⇒ 6g + 15f - 36 = 0 --------(7)

Subtracting (6) from (7),

⇒ 6g + 15f - 36 - (6g + 14f + 24) = 0 - 0

⇒ 6g + 15f - 36 - 6g - 14f - 24 = 0

⇒ f - 60 = 0

⇒ f = 60

Substituting value of f in (5),

⇒ 2g + 5(60) - 12 = 0

⇒ 2g + 300 - 12 = 0

⇒ 2g + 288 = 0

⇒ 2g = -288

⇒ g = -144

Substituing value of f and g in (3),

⇒ g + f + c + 1 = 0

⇒ -144 + 60 + c + 1 = 0

⇒ c - 83 = 0

⇒ c = 83

Hence, f = 60, g = -144 and c = 83.

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