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x-15=5x+1
-4x=16 /: (-4)
x= -4
b)5/6(x-1)=4
5/6x - 5/6+4 /*6
5x- 5=24
5x=29
x=29/5 (wyciągnij całości)
c) -1/2(-x-6)=-x
1/2x + 3 = x
1½x=-3
x=-2
d)2x+3/5=2-x/3-x /*15
30x+9=30-5x-15x
50x=21
x=21/50
e)x+1/2-x-1/3=1/4
0=1 sprzeczność
f) 4x+7/2-5x-1/6=x+5 /*6
24x+21-30x-1=6x+30
-12x=10
x=-10/12
g) x+5/4-2x+1/8=1/2(2-x) / *8
8x+10-16x+1=8-4x
-4x=-3x
x= 3/4