Sagot :
Réponse:
Bonsoir
a. -3 + x = 7
<=> x = 10
b. x + 8 = 11
<=> x = 3
c. 5x = 19
<=> x = 19/5
d. -2x = 9
<=> x = -9/2
e. 3x + 7x = 50
<=> 10x = 50
<=> x = 5
f. -4x + 9x = 45
<=> 5x = 45
<=> x = 9
Réponse:
Bonsoir :)
Exercice 28
-3+x=7
x=7+3
x=10
x+8=11
x=11-8
x=3
5x=19
x=19/5
x=3,8
-2x=9
-x=9/-2
x=9/2
x=4,5
3x+7x=50
10x=50
x=50/10
x=5
-4x+9x=45
5x=45
x=45/5
x=9
j'espère avoir pu t'aider