Ответы и объяснения

2013-05-16T09:49:28+04:00

-3.7 * 2.5x - (-3.7*7.6) = -3.66+2.1x

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

-11,35x + 31.78= 0

-11,35x = - 31.78

x = -31.78/-11,35

x= 2.8

 

2013-05-16T09:51:41+04:00

-9,25х+28,12= -3,66+2,1х

-9,25х-2,1х= -3,66-28,12

-11,35х= -31,78

х= -31,78:(-11,35)

х=2,8