Sagot :
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
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