Bonsoir,
[tex]a)f(8) = - 5 \times 8 + 7 = - 40 + 7 = - 33[/tex]
[tex]b)f( - 2) = - 5 \times ( - 2) + 7 = 10 + 7 = 17[/tex]
[tex]c) - 5x + 7 = 37[/tex]
[tex]5x = 7 - 37[/tex]
[tex]5x = - 30[/tex]
[tex]x = - \frac{30}{5} [/tex]
[tex]x = - 6[/tex]
[tex]d) - 5x + 7 = - 10[/tex]
[tex]5x = 7 + 10[/tex]
[tex]5x = 17[/tex]
[tex]x = \frac{17}{5} [/tex]
