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Sagot :

ANASAG

Réponse:

x+11 =9

x = 9-11

x = -2

8+x =10

x = 10-8

x = 2

2,5 +x = 4

x = 4 - 2,5

x = 1,5

x -11 = 3

x = 3+11

x = 14

x -5,9 = 7

x = 7+5,9

x = 12,9

x -(-6) = 12

x +6 = 12

x = 12-6

x = 6

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