Ответы и объяснения

2013-04-10T15:02:49+04:00

1. 8х-3=5х+6

8x - 5x = 6 + 3

3x = 9

x = 3

 

2.  7*(3+k)=33+5k

21 + 7k = 33 + 5k

7k - 5k = 33 - 21

2k = 12

k = 6

2013-04-10T15:03:21+04:00

8х-3=5х+6  

8х-5х=6+3

3х=9

х=3 

 

  7*(3+k)=33+5k

21+7k=33+5k

7k-5k=33-21

2k=12

k=6