यदि $a^{2}+b^{2}-c^{2}=2(a-b-c)-3$ है,तो $4a-3b+5c$ का मान ज्ञात कीजिए।

  • A
    $2$
  • B
    $3$
  • C
    $5$
  • D
    $6$

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यदि $2x + y = 17$,$y + 2z = 15$ और $x + y = 9$ है,तो $4x + 3y + z$ का मान क्या होगा?

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