Zadanie 3
c)
\frac{4*x-7}{2}-\frac{6*3-x}{3} =\frac{4x-7}{2}-\frac{18-x}{6}=\frac{3(4x-7)-2(18-x)}{6}=
\frac{12x-21-36+2x}{6}=\frac{14x-57}{6}
d)
-(x-2)-4(\frac{1}{2}-x)=-x+2-4*\frac{1}{2}-4x=-x+2-2+4x=3x
e)
4*\frac{x-7}{2}-6*\frac{3-x}{3}=2(x-7)-2(3-x)=2x-14-6+2x=4x-20=4(x-5)
f)
-\frac{6a+4}{2}-\frac{9a-3}{3}=\frac{-2(3a+2)}{2}-\frac{3(3a-1)}{3}=-(3a+2)-(3a-1)=
-3a-2-3a+1=-6a-1