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d) (-1/2x+1) + 3x/2=3 ½x
-0,5x+1+1,5x=3,5x /-x
2,5x=1
x=0,4
e) 3(y/3+1) -2=4(1-y)
y+3-2=4-4y /+4y-1
5y=3
y=0,6
f) 0.5(2-4x)= 3-x
1-2x=3-x /+2x-3
x=-2
8.
a) 12y-(y+5)=10y-1
12y-y-5=10y-1 /-10y+5
y=4
b) 2(u-5)+15=3(u-4)+10
2u-10+15=3u-12+10 /-3u-5
-u=-7
u=7
c) -3(y/3+1)-2=4(1-y)
-y-1-2=4-4y /+4y+3
3y=7
y=2 1/3
d) 2(3a-2)-6=4,5(2a-1+1/2)
6a-4-6=9a-4,5+2,25 /+10-9a
-3a=7,75
a=2,58(3)