Question

Giải thích rõ ràng

Answer 1

Làm câu a,b,c,d thôi

 a) \(6⋮x,x\in Z\)

  \(\Rightarrow x\in\) Ư\(\left(6\right)\){\(-6;-3;-2;-1;1;2;3;6\)}

b) \(x-33=-23\)

    \(x=\left(-23\right)+33\)

    \(x=10\)

c) \(\dfrac{2}{5}+x=\dfrac{11}{30}\)

            \(x=\dfrac{11}{30}-\dfrac{2}{5}\)

            \(x=-\dfrac{1}{30}\)

d) \(\dfrac{x}{14}=\dfrac{3}{7}\)

     \(x=\dfrac{3\cdot14}{7}\)

     \(x=6\)