1,2+ 3/10y=8/15y+0,78
3/10у - 8/15у = 0,78 - 1,2
-7/30у = -42/100 = -21/50
у = -21/50 : (-7/30) = -21/50 х (-30/7)
у =9/5 = 1,8
1,2+ 3/10y=8/15y+0,78
3/10у - 8/15у = 0,78 - 1,2
-7/30у = -42/100 = -21/50
у = -21/50 : (-7/30) = -21/50 х (-30/7)
у =9/5 = 1,8