Ответы и объяснения

2013-05-08T02:41:59+04:00

1) -3,7*(2,5x-7,6)=-3,66+2,1x
-(9.25x-28.12)+3.66-2.1x=0

-9.25x+28.12+3.66-2.1x=0

-9.25x+31.78-2.1x=0

-11.35x+31.78=0

x=31.78/11.35

x=2.8


2) 0,4*(y-0.60)=0.5*(y-0.8)+0.08
0.4y-0.24-(0.5y-0.4)-0.08=0

-0.1y-0.24+0.4-0.08=0

-0.1y+0.16-0.08=0

-0.1y+0.08=0

y=0.08/0.1

y=0.8