bjr
C = 7 x (11 + c )
C = 7 x (11 + c ) on multiplie par 7 chacun des termes entre parenthèses
C =7 x 11 + 7 x c
= 77 + 7c
D = 8 x (D + 8) = 8 x D + 8 x 8 = 8D + 64
E = 2 x (a - 4) = 2 x a - 2 x 4 = 2a - 8
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bjr
C = 7 x (11 + c )
C = 7 x (11 + c ) on multiplie par 7 chacun des termes entre parenthèses
C =7 x 11 + 7 x c
= 77 + 7c
D = 8 x (D + 8) = 8 x D + 8 x 8 = 8D + 64
E = 2 x (a - 4) = 2 x a - 2 x 4 = 2a - 8