c)
\frac{2}{3}x - 4 \frac{2}{3} = 2(x-3)
\frac{2}{3}x - \frac{14}{3} = 2(x-3) |*3
2x-14=6(x-3) |:2
x-7=3(x-3)
x-7=3x-9
x-3x=7-9
-2x=-2 |:(-2)
x=1
d)
-5x +2(1 -x) = -x -2 (x +1) |+x do obu stron równania
-4x+2(1-x)=-2(x+1) |:(-2)
2x-2(1-x)=x+1
2x-2+2x=x+1
4x-2=x+1
4x-x=1+2
3x=3
x=1