Ответы и объяснения

2014-02-27T08:54:02+00:00
300х -72:7=204
300х=204+72/7
300х=204+10 2/7
300х=214 2/7
х=1500/7:300
х=1500/7*1/300
х=5/7
2014-02-27T08:56:09+00:00
(300*х-72)/7=96+108
300x -72/7 = 204 /*7
300x - 72 = 204 * 7
300x = 1428 + 72300
x = 1500 /: 300
x= 5