15 O quádruplo do sucessor de um número somado ao dobro de seu antecessor é igual a 80 Qual é o número

15 O quádruplo do sucessor de um número somado ao dobro de seu antecessor é igual a 80 Qual é o número



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    Obs:» . «= vezes( x) e » / «= dividido( 🙂
    4.(X+1)+2.(X-1)=80
    4X+4+2X-2=80
    6X+2=80
    6X=80-2
    6X=78
    X=78/6
    X=13
  • Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
    Um nmero = x
    Um nmero sucessor = x + 1
    Um nmero antecessor = x — 1
    ………………………………………………………………..

    Clculo

    4.( x + 1 ) + 2.( x — 1 ) = 80
    4x + 4 + 2x — 2 = 80
    4x + 2x = 80 + 2 — 4
    6x = 82 — 4
    6x = 78
    x = 78
    6
    x = 13

    Resposta: O nmero 13.


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