390+4900÷к=460
4900÷к=460-390
4900÷к=70
к=4900÷70
к=70
230×а+40=10000÷20
230×а+40=500
230×а=500-40
230×а=460
а=460÷230
а=2 Рада помочь
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Verified answer
390+4900÷к=460
4900÷к=460-390
4900÷к=70
к=4900÷70
к=70
230×а+40=10000÷20
230×а+40=500
230×а=500-40
230×а=460
а=460÷230
а=2 Рада помочь