Respuestas

2012-08-13T19:13:44+02:00

3(4x-7)-2(x-9)=31

12x-21-2x+18=31

10x=34

x=34/10

x=17/5

 

2(x+6)+3(2x-9)=10

2x+12+6x-27=10

8x=25

x=25/8

 

 

2012-08-13T22:13:56+02:00

3(4x-7)-2(x-9)=31

12x-21-2x+18=31

10x=34

x=34/10                        =34%2=17        y         10%2=5

 

x=17/5

 

2(x+6)+3(2x-9)=10

2x+12+6x-27=10

8x=25

x=25/8