Sagot :
Bonjour,
a 4x=56
x = 56/4
x = 14
b x-9=5
x = 5 + 9
x = 14
c 2x+6=22
2x = 22 - 6
2x = 16
x = 16/2
x = 8
d5x-8=-3
5x = - 3 + 8
5x = 5
x = 5/5
x = 1.
bjr
4x = 56
donc 4 fois x = 56
que vaut x ?
4 gâteaux coûtent 56€
que vaut un gâteau ? 56 : 4
pareil ici
si 4x = 56
alors x = 56/4 = 56 : 4 = 14
x - 9 = 5
x - 9 + 9 = 5 + 9
x = 14
2x + 6 = 22
2x + 6 - 6 = 22 - 6
2x = 16
x = 16/2
x = 8
5x - 8 = -3
5x - 8 + 8 = -3 + 8
5x = 5
x = 1