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3x-5x=5/2+1-10
-2x=-6 1/2 \ *2
-4x=-13 \ :-4
x=3 1/4
f)x/2=2/5(4-x)-4
x/2=8/5 - 2/5x -4
x/2+2/5x=8/5-4 \ *5
5x+2x=8-20
7x=-12 \ :7
x=-1 5/7
g)2x-1/5-x-2/2=0,7x \ *10
20x-2-20x-10=7x
20x-20x-7x=2+10
7x=12 \ :7
x=1 5/7
h)2x-3x+5/4=-1/4x-1 \ *4
8x-12x+5=-x-4
8x-12x+x=-5-4
-3x=-9 \ :-3
x=3