Sagot :
A) 1+5x = 15
5x = 15-1 = 14
X = 14/5
B) 4x-7=8
4x=8+7
X= 15/4
C) 5x = 3x+3
5x-3x=3
2x =3
x= 3/2
D)7x=-5-x
8x=-5
x=-5/8
5x = 15-1 = 14
X = 14/5
B) 4x-7=8
4x=8+7
X= 15/4
C) 5x = 3x+3
5x-3x=3
2x =3
x= 3/2
D)7x=-5-x
8x=-5
x=-5/8
Réponse :
Explications étape par étape :
a) 1+5x=15
5x=15-1
5x=14
x=14/5
b) 4x-7=8
4x=8+7
4x= 15
x=15/4
c)5x=3x+3
5x-3x=3
2x =3
x=3/2
d) 7x=-5-x
7x+x=-5
8x=-5
x= -5/8