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

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

Answer 1

10*х=8*25
х＝8*25
х＝200
х＝200/10
х＝20

х/20＝4800/80
х＝60
х＝60*20
х＝1200

（х-380）*50＝2000
х＝2000/50
х＝40
х＝380+40
х＝420

Comments

(х+8):70=4
х＝70*4 х＝280 х＝280-8 х＝272