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Sagot :

-3+x=7

x-3+3 = 7+3

x=10

b.5x=19

x=19/5 = 3,8

d.x+8 = 11

x + 8-8 = 11-8

x=3

e.-2x=9

x=9/(-2) = -4,5

c. 3x + 7x = 50

10x = 50

x=5

f. -4x+9x=45

5x=45

x=9

Réponse :

bonjour

Explications étape par étape :

a.-3+x=7

x=7+3

x=10

b.5x=19

x=19/5

d.x+8 = 11

x=11-8

x=3

e.-2x=9

x=-9/2

c. 3x + 7x = 50

10x=50

x=50/10

x=5

f. -4x+9x=45

5x=45

x=45/5

x=9

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