Respuesta :

[tex]\dfrac{1}{4}(20-4a)=6-a\ \ \ \ \ |use\ distributive\ property:a(b-c)=ab-ac\\\\5-a=6-a\ \ \ \ \ |add\ "a"\ to\ both\ sides\\\\5=6\ \ \ FALSE\\\\Answer:\boxed{D.\ No\ solution.}[/tex]