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  • Utilisateur Brainly
2014-03-17T19:48:21+01:00
Bonjour

)3m+8=5
 3m  =-8+5
 3m = -3
 m  =-1

b)6y-8=y+6
6y-y = +8+6
5y = 14
y  =14/5

c) (x+7)x(3x-5)=0

x+7 = 0
x =-7

3x-5 =0
3x = 5
x = 5/3

2014-03-17T19:56:51+01:00
A) 3m+8=5
3m=5-8
3m=-3
3m/3= -3/3
m= -1

b) 6y-8=y+6
6y-y=6+8
5y=14
5y/5=14/5
y=2.8

c) (x+7) (3x-5) =0
x+7=0          3x-5=0
x=-7             3x=5
                   3x/3=5/3
                   x=5/3