[tex]bonjour\\\\\\\\a + 7 = 5 \\a = 5 - 7\\a = - 2 \\\\\\b - 3 = 9 \\b = 9 + 3\\b = 12 \\\\- 11 = 4 + y \\- y = 4 + 11 \\- y = 15\\y = - 15 \\\\\\2 = - 10 + x \\- x = - 10 - 2 \\- x = - 12 \\x = 12[/tex]
Réponse :
Bjr,
1.
a + 7 = 5
a = 5-7
a = -2
2.
b-3 = 9
b = 9+3
b = 12
3.
-11 = 4+y
-y = 4+11
y = -15
4.
2 = -10+x
-x = -10-2
-x = -12
x = 12
J'espère avoir pu vous aider
