-6х-7х=135+21
-13=156
Х=-12
1002,1003,1004,1005,1006,1007
10001,10002,10003,10004,10005,10006,10007,10008,10009
59990,59991,59992,59993,59994,59995,59996,59997,59998,59999
375544,375545,375546,375547,375548,375549,375550,375551,375552,375553,375554,375555
1)341+2267=2608
2)2608*12=31296
3)31296-30202=1094
4)202*1094=220988