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Réponse :

bonsoir

avec 5

A  100-(5+25)=70

B 100-(5-25)=120

C 100+(5-25)=80

D 100-5+25=120

E 100-5-25=70

F 100+5-25=80

A=E

B=D

C=F

avec -15

A 100-(-15+25)=90

B 100-(-15-25)=140

C 100+(-15-25)=60

D 100-(-15)+25=140

E 100-5-(-15)-25=90

F 100+(-15)-25=60

idem

a-(b+c)=a-b-c

a+(b-c)=a+b-c

a-(b-c)=a-b+c

a+(-b+c)=a-b+c

Explications étape par étape

Verified answer

Réponse :

Explications étape par étape

Bonsoir

Avec b = 5

A = 100 - (b + 25)

A = 100 - (5 + 25)

A = 100 - 30

A = 70

B = 100 - (b - 25)

B = 100 - (5 - 25)

B = 100 - (-20)

B = 100 + 20

B = 120

C = 100 + (b - 25)

C = 100 + (5 - 25)

C = 100 + (-20)

C = 100 - 20

C = 80

D = 100 - b + 25

D = 100 - 5 + 25

D = 125 - 5

D = 120

E = 100 - b - 25

E = 100 - 5 - 25

E = 100 - 30

E = 70

F = 100 + b - 25

F = 100 + 5 - 25

F = 105 - 25

F = 80

A = E

B = D

C = F

b = -15

A = 100 - (b + 25)

A = 100 - (-15 + 25)

A = 100 - 10

A = 90

B = 100 - (b - 25)

B = 100 - (-15 - 25)

B = 100 - (-40)

B = 100 + 40

B = 140

C = 100 + (b - 25)

C = 100 + (-15 - 25)

C = 100 + (-40)

C = 100 - 40

C = 60

D = 100 - b + 25

D = 100 - (-15) + 25

D = 100 + 15 + 25

D = 100 + 40

D = 140

E = 100 - b - 25

E = 100 - (-15) - 25

E = 100 + 15 - 25

E = 115 - 25

E = 90

F = 100 + b - 25

F = 100 + (-15) - 25

F = 100 - 15 - 25

F = 100 - 40

F = 60

a - (b + c) = a - b - c

a - (b - c) = a - b + c

a + (b - c) = a + b - c

a + (-b + c) = a - b + c