(С-120)•70=28070 C - 8400 = 28070 C = 280 + 840070 C = 8680C = 8680 / 70C = 124
(с-120)*70=280
70с-8400=280
70с=280+8400
70с=8680
с=8680:70
с=124
Ответ:124
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(С-120)•70=280
70 C - 8400 = 280
70 C = 280 + 8400
70 C = 8680
C = 8680 / 70
C = 124
(с-120)*70=280
70с-8400=280
70с=280+8400
70с=8680
с=8680:70
с=124
Ответ:124