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10*(3x-5) - 2*(5x-1)=0
30x-50-10x+2=0
30x-10x=50-2
20x=48
x=2,4
f)x/2= 2/5*(4-x) - 4 //*10
5x=4*(4-x)-4
5x=16-4x-4
5x+4x=16-4
9x=12
x= 12/9
g)(2x-1)/5 - (x-2)/2= 0,7x //*10
2*(2x-1) - 5*(x-2) = 7x
4x-2-5x+10=7x
4x-5x-7x=2-10
-16x=-8
x=0,5
h) 2x-(3x+5)/4 = -1/4x - 1 //*4
8x-3x-5= -x - 4
5x-5=-x-4
5x+x=-4+5
6x=1
x=1/6