\(199-42:6.x+15=200\)
\(199-7x+15=200\)
\(214-7x=200\)
\(7x=214-200\)
\(7x=14\)
\(x=14:7\)
\(x=2\)
\(199-42:6\cdot x+15=200\)
\(\Rightarrow199-7x+15=200\)
\(\Leftrightarrow214-7x=200\)
\(\Leftrightarrow214-7x=200\)
\(\Leftrightarrow-7x=200-214\)
\(\Leftrightarrow-7x=-14\)
\(\Rightarrow x=2\)
Vậy \(x=2\)
\(199-42:6.x+15=200\)
\(199-7x+15=200\)
\(199-7x=200-15\)
\(199-7x=185\)
\(7x=199-185\)
\(7x=14\)
\(x=14:7\)
\(x=2\)
Vậy \(x=2\) là giá trị cần tìm