419-х:6=349
спасибо. за помощь
419-х:6=349Х:6=419-349Х:6=70х=70*6 х=420
419-420:6=419-70=349
ОДЗ х=-∞;+∞
упростили:
-x/6=-70
-(x-420)/6=0
x=420
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419-х:6=349
Х:6=419-349
Х:6=70
х=70*6
х=420
419-420:6=419-70=349
ОДЗ х=-∞;+∞
упростили:
-x/6=-70
-(x-420)/6=0
x=420