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a) x+2/9 + x-1/3= 1
x+x=1/3-2/9
2x=1/9 //:2
x=1/18
b) 3x-5/2 - 5x-1/10= 0
3x-5x=5/2+1/10
-2x=26/10
x = -13/10
x=-1,3
c) x/2=2/5(4-x)-4
x=2,(6)
d) 2x - 3x+5/4= -1/4x - 1
x=3
2x=1-2/9+1/3
2x=9/9-2/9+3/9
2x=10/9 :2
x=1,1...
b) 3x-5/2 - 5x-1/10= 0
-2x=5/2+1/10
-2x=25/10+1/10
-2x=26/10
-2x=2,6 /-2
x=-1,3
c) x/2=2/5(4-x)-4
x/2=1 3/5-2/5x-4
x/2+2/5 x=8/5-4 /*10
10*x/2+10*2/5 x=16-40
-x=-24 /:-1
x=24
d) 2x - 3x+5/4= -1/4x - 1
2x-3x+1/4x=-1-5/4
-0,75x=-2,25 /:,075
x=3