bonjour, voici la réponse
Explications étape par étape:
a= 3/8 - x/d = 1/9
a= 3×9/8×9 - x/d = 1×8/9×8
a= 27/72 - x/d = 8/72
a= 27/72 - 19/72 = 8/72
donc a= 3/8 - 19/72 = 1/9
b= 2/7 - v/b = -9/4
b= 2×4/7×4 - v/b = -9×7/4×7
b= 8/28 - v/b = -63/28
b= 8/28 - 71/28 = -63/28
donc b= 2/7 - 71/28 = -9/4
c= 5/4 - m/p = 4/5
c= 5×5/4×5 - m/p = 4×4/5×4
c= 25/20 - m/p = 16/20
c= 25/20 - 9/20 = 16/20
donc 5/4 - 9/20 = 4/5
et voilà !
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bonjour, voici la réponse
Explications étape par étape:
a= 3/8 - x/d = 1/9
a= 3×9/8×9 - x/d = 1×8/9×8
a= 27/72 - x/d = 8/72
a= 27/72 - 19/72 = 8/72
donc a= 3/8 - 19/72 = 1/9
b= 2/7 - v/b = -9/4
b= 2×4/7×4 - v/b = -9×7/4×7
b= 8/28 - v/b = -63/28
b= 8/28 - 71/28 = -63/28
donc b= 2/7 - 71/28 = -9/4
c= 5/4 - m/p = 4/5
c= 5×5/4×5 - m/p = 4×4/5×4
c= 25/20 - m/p = 16/20
c= 25/20 - 9/20 = 16/20
donc 5/4 - 9/20 = 4/5
et voilà !