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5/4x-3(4/3-2x)=2-3x/4-x+2/5
5/4x-4+6x=2-3x/4-x+2/5 /*20
25x-80+120x=10-15x-4x-8
25x+120x+15x+4x=10-8+80
164x=82
x=1/2 (0,5)
2) x-1/2-x-2/4-x-4/8+1=5(3-x)/4+2x
x-1/2-x-2/4-x-4/8+1=15-5x/4+2x /*8
4x-4-2x+4-x+4+1=30-10x+16x
4x-2x-x+10x-16x=30+4-4-4-1
5x=25
x5