Решите уравнения ) k*9=130+140 2) d: 6=200-120 3)164 -c=60*6

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

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