10*х=8*25 х: 20=4800: 80 (х-380)*50=2000 (х+8): 70=4 640: (25-х)=40 2700: (х-12)=90

Question

Математика: 10*х=8*25 х: 20=4800: 80 (х-380)*50=2000 (х+8): 70=4 640: (25-х)=40 2700: (х-12)=90

knepsuhell · Answer

10*х=8*25х＝8*25х＝200х＝200/10х＝20х/20＝4800/80х＝60х＝60*20х＝1200（х-380）*50＝2000х＝2000/50х＝40х＝380+40х＝420...

10х=825 х: 20=4800: 80 (х-380)*50=2000 (х+8): 70=4 640: (25-х)=40 2700: (х-12)=90