1)8,9х=5,4+2,84-17,54
8,9х=-9,3
х= -1 4/89
2) 15-3х+13=12х-32
-3х-12х=-32-13-15
-15х= - 60
х=4
3) 4х- 1/4х=5 3/7-3/7
3 4/4х- 1/4х= 5
3 3/4х=5
х=4/3=1 1/3
