Question

tìm x biết 

a x+1/10 + x+11/11 =x+11/12

b -|x-1/2|=1/2

giúp mình nha cảm ơn

Answer 1

\(a)\)

\(x+\frac{1}{10}+x+\frac{11}{11}=x+\frac{11}{12}\)

\(\Leftrightarrow x=\frac{11}{12}-\frac{1}{10}-\frac{11}{11}\)

\(\Leftrightarrow x=\frac{-11}{60}\)

\(b)\)

\(-\left|x-\frac{1}{2}\right|=\frac{1}{2}\)

\(\Leftrightarrow\left|x-\frac{1}{2}\right|=\frac{-1}{2}\) (Vô lý)

Vậy \(x\in\varnothing\)