Ответы и объяснения

2013-04-26T16:47:11+00:00

3/7-1/4x= 5 3/7 - 4x
-1/4x+4x = 5 3/7 - 3/7
3/4 x = 5
x = 5 :  3/4
x = 3, 5 

2013-04-26T22:05:49+00:00

3/7-1/4x=5 3/7-4x
3/7-1/4x-5 3/7+4x=0

3/7-0.25x-5 3/7+4x=0

3/7-0.25x-38/7+4x=0

-5-0.25x+4x=0

-5+3.75x=0

x=5/3.75

x=4/3