Question

x-{[-x+(x+3)]}-[(x+3)-(x-2)]=0

nhầm câu kia sai đề

 

Answer 1

\(\Leftrightarrow x-\left\{\left[-x+x+3\right]-\left[x+3-x+2\right]\right\}=0\)

\(\Leftrightarrow x-\left\{\left[3-5\right]\right\}=0\)

=>x-(-2)=0

=>x=-2

Answer 2

\(x-\left[-x+x+3\right]-\left(x+3-x+2\right)=0\\ x-3-5=0\\ x=8\)

Answer 3

\(x-\left\{\left[-x+\left(x+3\right)\right]\right\}-\left[\left(x+3\right)-\left(x-2\right)\right]=0\)

\(\Rightarrow x-\left\{\left[-x+x+3\right]\right\}-\left[x+3-x+2\right]=0\)

\(\Rightarrow x-\left\{0+3\right\}-\left[0+5\right]=0\)

\(\Rightarrow x-3-5=0\)

\(\Rightarrow x=3+5\)

\(\Rightarrow x=8\)