Question

помогите:
а) 1/6х + 5/12х =8,4
б) 1 целая 13/14-у=2целых
7/10
в)0,3(х-2)=0,6+0,2(х+4)

Answer 1

16х+512=8.4
212х+512=8 45
712х=8 45
х=8 45:712=445*127=52835=15 335

1 1314-у=2 710
-у=2 710-1 1314=1+(710-1314)=1+(7*14140-13*10140)
-у=1-835=2735
у=-2735

0.3(х-2)=0.6+0.2(х+4)
0.3х-0.6=0.6+0.2х+0.8
0.3х-0.2х=1.4+0.6
0.3х=2
х=2:0.3=2*310
х=35