Équations du type ax + b = cx + d a. 5x = 3x + 3 b. 8x = 12x + 4 c. 4 - 7y = 10y d. 7x + 1 = - 4 - x Merci d'avance !

a)5x = 3x + 3
5x-3x=3
2x=3
x=3/2

b. 8x = 12x + 4
8x-12x=4
-4x=4
x=-1

c. 4 - 7y = 10y
-7y-10y=-4
-17y=-4
y=4/17

d. 7x + 1 = - 4 - x
7x+x=-4-1
8x=-5
x=-5/8

A) 5x=3x+3
5x-3x=3
2x=3
X=3/2


B) 8x=12x+4
8x-12x=4
-4x=4
-4x*-1=4*-1
4x=-4
X=-1


C) 4-7y=10y
4=10y+7y
4= 17y
4/17=y


D) 7x+1=-4-x
7x+x=-4-1
8x=-5
X=-5/8