Ответы и объяснения

2013-02-14T17:36:44+04:00

k*9=130+140

9к=270

к=30

 

 

d:6=200-120

d:6=80

d=480

 

 

164 -c=60*6

-с=360-164

-с=196

с=-196

2013-02-14T17:42:53+04:00

1)k*9=130+140                                                                            130+140=270

k*9=270                                                                                          270:9=30 

k=270:9

k=30

Ответ. k=30.

 

 

2)d:6=200-120                                                                             200-120=80

d:6=80                                                                                                  80*6=480

d=80*6

d=480

Ответ. d=480.

 

 

3)164-c=60*6                                                                                

164-c=360

c=360+164

c=524

Ответ.c=524