a) (7 43/100 - 3 3/25) + х = 9

б) (8 61/100 - 3 3/4) + х = 14 1/10

Даю 20 баллов.

а)7,43-3,12+x=9x=9-4,31x=4,69 б)8,61-3,75+x=14,1x=14,1-4,86x=9,24

A) (7 43/100 - 3 3/25) + х = 9(7 43/100 - 3 12/100)+X=94  31\100+X=9x=9- 4  31\100x=4  69/100б) (8 61/100 - 3 3/4) + х = 14 1/10(8 61/100 - 3 75/100) + х = 14 1/10(7  161/100 - 3 75/100) + х = 14 1/104  86\100+X=14  10\ 100X=13  110\ 100- 4 86\100x=9  24\100=9  6/25