Se os salários, em reais, de João e pedro forem números diretamente proporcionais a 7 e 13 eo salário de João for igual a R$ 3 500,00, então o salário de

Se os salários, em reais, de João e pedro forem números diretamente proporcionais a 7 e 13 eo salário de João for igual a R$ 3 500,00, então o salário de



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    Joo = 3500,00

    Pedro = x 7 ——- 3500,00
    13 ——- x

    7x = 3500,00 x 13

    x = 6500,00 o salario de Pedro

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    Diretamente proporcional quer dizer que:

    7 ————————- 13
    3500 —————— x

    x.7 = 3500.13 x =  frac{3550.13}{7} x = $ 6.500,00

    Salrio de Pedro: $ 6.500, 00

    Soma dos salrios de Pedro e Joo:
    3.500 + 6.500 = $10.000,00

    Portanto 10.000 corresponde a 100% dos salrios, ento por regra de trs podemos confirmar a quanto porcento o salrio de Pedro corresponde:

    10 000 ———————— 100
    6 500 ———————— x

    x.10 000 = 6 500.100 x =  frac{6 500.100}{10 000} x = 65%


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