Ta có:
\(x=\frac{m-4}{m+3}=\frac{m+3-7}{m+3}=\frac{m+3}{m+3}-\frac{7}{m+3}\)
\(=1-\frac{7}{m+3}\)
=> Ta lại có:
\(\frac{1}{2}=1-\frac{7}{m+3}\)
\(\frac{7}{m+3}=1-\frac{1}{2}\)
\(\frac{7}{m+3}=\frac{1}{2}\)
\(\frac{7}{m+3}=\frac{7}{14}\)
=> m + 3 = 14
=> m = 14 - 3
=> m = 11
Vậy m = 11
ỦNG HỘ NHA