Question

determinati numerele rationale x,y ,z stiind ca sunt direct proportionale cu 2,3 si 4 ,iar 2x+3y-z=27

Answer 1

∅ Rezolvare :
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x = 2k

y = 3k

z = 4k


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→ 2x + 3y – z = 27 =>

→ 4k + 9k – 4k = 27 =>

→ 13k – 4k = 27 =>

→ 9k = 27 =>

→ k = 3
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→ x = 2 • 3

→ x = 6
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→ y = 3 • 3

→ y = 9
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→ z = 3 • 4

→ z = 12
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Answer 2

Rezolvarea este atasata ...............