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1/2y = 4 | :1/2
y = 8
b) 3/5y + 2/5 = 4 | - 2/5
3/5y = 3 i 3/5 | : 3/5
y = 6
c) 3(y + 2) = 5
3y + 6 = 5 | - 6
3y = -1 | :3
y = 0,(3)
d) 7(y +3) = 5y + 2 +2y
7y + 21 = 7y + 2 | -7y
21 = 2 - równanie sprzeczne
e) y/2 +1/3 = 7/6 | -1/3
y/2 = 5/6 | x2
y = 10/6
f) (y+3)/2 -(1 -y) = 3,5 | x2
y+3 -2x(1-y)==3,5 x 7
y+3-2+y= 7
2y+1= 7 |-1
2y= 6 |:2
y=3
g)1/5(y-3)-2/3 (y-3/5) +1/3 =2/5-1/3(2y-3)
1/5y-3/5-2/3y+6/10+1/3=2/5-2/3y+1
-7/15y+1/3=7/5-10/15y |+7/15
1/3=7/5 -1/5y |-7/5
-16/15=-3/15y | x(-1)
16/15=3/15y |x15/3
y=16/3
y=5 i 1/3
Niestety sorry ale nie mam dzisiaj więcej czasu.