А:69–754=48
а:69 = 754+48
а:69 = 802
а = 802*69
а = 55338
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55338:69-754=48
48=48
(4118–x):68=56
4118-х = 68*56
4118-х = 3 808
х = 4118 - 3 808
х = 310
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(4118-310):68=56
56=56
49•x–17301=12050
49*х=12050 + 17 301
49*х= 29 351
х = 29 351 : 49
х = 599
----------
49*599-17301=12050
12050=12050
40000–54•x=7492
54*х = 40 000 - 7492
54*х = 32 508
х= 32 508 : 54
х=602
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40000-54*602= 7492
7492=7492