Réponses

2013-05-26T22:54:51+02:00

A)2x+5=15-3x

A)2x+3x=15-5

a)5x=10

A)x=10/5

b)-6x+4=-1

-6x=-1-4

-6x=-5

x=5/6

c)7m+10=m-8

7m-m=-10-8

6m=-18

m=-18/6

d)-12y=4-13y

-12y+13y=4

y=4

2013-05-26T22:56:51+02:00
A
2x+5=15-3x
2x+3x=15-5
5x=10
X=10/5
X=2

B
-6x+4=-1-x
-6x-x=-1-4
-7x=-5
X=-7/-5
X=7/5

C
7m+10=m-8
7m-m=-8-10
6m=-18
M=-18/6

D
-12y=4-13y
-12y+13y=4
Y=4
Voilà les réponses ;)