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Mathematics Algebra Equation Solving Wolfram Language

Find number of years for each animal from this system of equations

Bogd Timo

Posted 5 years ago

Dear all I have the notebook calculation and i want to find how many years each animal lives: deer,bear,fox Solve[nrAniVeverita == nrAniIepure - 3 && nrAniVulpea == 2nrAnIepure && nrAniCerbul == 10 + nrAniVulpea && nrAniUrsul == nrAniCerbul + nrAniVulpea && nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea >= 110 && nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea <= 120, {nrAniCerbul, nrAniUrsul, nrAniVeverita, nrAniVulpea} ] The solver returns {} Can you please help ? Attachments:* Multimi.nb

Dear all I have the notebook calculation and i want to find how many years each animal lives: deer,bear,fox

Solve[nrAniVeverita == nrAniIepure - 3 &&
  nrAniVulpea == 2*nrAnIepure &&
  nrAniCerbul == 10 + nrAniVulpea &&
  nrAniUrsul == nrAniCerbul + nrAniVulpea &&
  nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea >= 110 && 
  nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea <= 120,
 {nrAniCerbul, nrAniUrsul, nrAniVeverita, nrAniVulpea}
 ]

The solver returns {} Can you please help ?

POSTED BY: Bogd Timo

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Bogd Timo

Posted 5 years ago

Solve[nrAniVeverita == nrAniIepure - 3 && nrAniVulpea == 2*nrAniIepure && nrAniCerbul == 10 + nrAniVulpea && nrAniUrsul == nrAniCerbul + nrAniVulpea && nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea + nrAniIepure >= 110 && nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea + nrAniIepure <= 120, {nrAniVeverita, nrAniIepure, nrAniVulpea, nrAniCerbul, nrAniUrsul}, Integers ] `{{nrAniVeverita -> 7, nrAniIepure -> 10, nrAniVulpea -> 20, nrAniCerbul -> 30, nrAniUrsul -> 50}}` I solved it, you were right.

Solve[nrAniVeverita == nrAniIepure - 3 &&
      nrAniVulpea == 2*nrAniIepure &&
      nrAniCerbul == 10 + nrAniVulpea &&
      nrAniUrsul == nrAniCerbul + nrAniVulpea &&
      nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea + 
        nrAniIepure >= 110 && 
      nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea + 
        nrAniIepure <= 120,
     {nrAniVeverita, nrAniIepure, nrAniVulpea, nrAniCerbul, 
      nrAniUrsul}, Integers
     ]
`{{nrAniVeverita -> 7, nrAniIepure -> 10, nrAniVulpea -> 20, 
       nrAniCerbul -> 30, nrAniUrsul -> 50}}`

I solved it, you were right.

POSTED BY: Bogd Timo

l van Veen

l van Veen, Hewlett-Packard Enterprise

Posted 5 years ago

Spelling mistake nrAnIepure instead of nrAniIepure Solve[nrAniVeverita == nrAniIepure - 3 && nrAniVulpea == 2*nrAniIepure && nrAniCerbul == 10 + nrAniVulpea && nrAniUrsul == nrAniCerbul + nrAniVulpea && nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea >= 110 && nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea <= 120, {nrAniCerbul, nrAniUrsul, nrAniVeverita, nrAniVulpea, nrAniIepure}, Integers] {{nrAniCerbul -> 32, nrAniUrsul -> 54, nrAniVeverita -> 8, nrAniVulpea -> 22, nrAniIepure -> 11}}

Spelling mistake nrAnIepure instead of nrAniIepure

Solve[nrAniVeverita == nrAniIepure - 3 && 
      nrAniVulpea == 2*nrAniIepure && nrAniCerbul == 10 + nrAniVulpea && 
      nrAniUrsul == nrAniCerbul + nrAniVulpea && 
      nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea >= 110 && 
      nrAniCerbul + nrAniUrsul + nrAniVeverita + nrAniVulpea <= 
       120, {nrAniCerbul, nrAniUrsul, nrAniVeverita, nrAniVulpea, 
      nrAniIepure}, Integers]

{{nrAniCerbul -> 32, nrAniUrsul -> 54, nrAniVeverita -> 8, nrAniVulpea -> 22, nrAniIepure -> 11}}

POSTED BY: l van Veen

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