Ответы и объяснения

2013-04-07T00:28:59+04:00
9,54(0,3х + 0,49х) - 4,74 = 8,94(0,3х + 0,49х)
9,54*0,79х - 8,94*0,79х = 4,74
0,79х = 4,74
х = 6.
2013-04-07T00:39:57+04:00

9,54*(0,3х+0,49х)- 4,74=8,94(0,3х+0,49х);
9,54*0,79х-8,94*0,79х=4,74;
0,79х=4,74;
х=6.