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Réponse:

E =

[tex] \frac{ - 14}{9} \times \frac{33}{ - 70} = \frac{ - 462}{ - 630} = \frac{11}{15} [/tex]

F =

[tex]13 \times \frac{9}{ - 26} = \frac{117}{ - 26} = - \frac { 9}{2} [/tex]

G =

[tex] \frac{ - 40}{ - 3} \times \frac{18}{ - 35} = \frac{ - 720}{105} = \frac{ - 40}{7} [/tex]

H =

[tex] \frac{3}{80} \times \frac{8}{9} = \frac{24}{720} = \frac{1}{30} [/tex]