Sagot :
[tex]bonjour\\\\\\5 x = 3 x + 3 \\5 x - 3 x = 3 \\2 x = 3 \\x = 3/2\\\\\\8 x = 12 x + 4 \\8 x - 12 x = 4 \\- 4 x = 4 \\x = - 1 \\\\\\4 - 7 y = 10 y \\- 7 y - 10 y = - 4 \\- 17 y = - 4 \\y = 4/17 \\\\\\7 x + 1 = - 4 - x \\7 x + x = - 4 - 1 \\8 x = - 5 \\x = - 5/8\\\\\\5 + 3 x = 7 - 3 x \\3 x + 3 x = 7 - 5 \\6 x = 2 \\x = 2/6 = 1 /3 \\\\\\11 x + 3 = 8 x + 7\\11 x - 8 x = 7 - 3\\3 x = 4 \\x = 4/3 \\\\\\[/tex]
[tex]5.5 x + 1.5 = 9 x + 6 \\5.5 x - 9 x = 6 - 1.5\\- 3.5 x = 4 .5\\x = - 45/35 = - 9 /7 \\\\7 - 3.3 x = 2 x - 9 .7\\- 3.3 x - 2 x = - 9.7 - 7 \\- 5.3 x = - 16.7\\x = 167/53 \\\\5.1 - x = 8 x + 1.7\\- x - 8 x = 1.7 - 5.1\\- 9 x = - 3.4\\x = 34/90 = 17/ 45 \\\\\\[/tex]
Réponse :
salut :)
Explications étape par étape
a) 5x=3x+3
⇒5x-3x=3
⇒2x=3
⇒x=3/2
b) 8x=12x+4
⇒-4=12x-8x
⇒-4=2x
⇒-4/2=x
x= -2
c) 4-7y=10y
⇒4=10y-7y
⇒4=3y
⇒4/3=y
d) 7x+1=-4-x
⇒7x+x=-4-1
⇒8x=-5
⇒x=-5/8
e) 2+3x=7-3x
⇒3x+3x=7-2
⇒6x=5
⇒x=5/6
f) 5+6x=-x-9
⇒5+9=-x-6x
⇒14=-7x
⇒x=14/-7
⇒x= -2
g) 11x+3=8x+7
⇒11x-8x=7-3
⇒3x=4
⇒x=4/3
h) 5,5x+1,5=9x+6
⇒-6+1,5=9x-5.5x
⇒-4,5=3.5x
⇒-4,5/3,5=x
⇒-9/7=x
i) 7- 3,3x=2x-9,7
⇒7+9.7=2x+3,3x
⇒16,7=5.3x
⇒16.7/5.3=x
⇒167/53=x
j) 5,1-x=8x+1.7
⇒5.1-1.7=8x+x
⇒3.4=9x
⇒3.4/9=x
⇒17/45=x
bonne chance