Odpowiedzi

2010-01-12T16:43:31+01:00
-3(y/3+1)-2=4(1-y)
-y - 3 - 2 = 4 - 4y
3y = 9 |:3
y = 3
2010-01-12T16:45:06+01:00
-3(y/3+1)-2=4(1-y)
-3y/3-3-2=4-4y / *3
-3y -9-6=12-12y / +12y
9y -15=12 / +15
9y = 27 / :9
y=3