bonsoir
x + 11 = 9
x = 9 - 11
x = - 2
8 + x = 10
x = 10 - 8
x = 2
x - 11 = 3
x = 3 + 11
x = 14
2.5 + x = 4
x = 4 - 2.5
x = 1.5
x - 5.9 = 7
x = 7 + 5.9
x = 12.9
allez fais la dernière
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=12+(-6)
x=6
