16, giải phương trình.

1, \(\frac{x+5}{65}+\frac{x+10}{60}=\frac{x+15}{55}+\frac{x+20}{50}\)

2, \(\frac{x+91}{81}+\frac{x+92}{82}+\frac{x+93}{83}=3\)

3, \(\frac{59-x}{19}+\frac{58-x}{18}=\frac{57-x}{17}+\frac{56-x}{16}\)

4, \(\frac{x}{15}+\frac{x+1}{16}+\frac{x+2}{17}+\frac{x+3}{18}+\frac{x+4}{19}=5\)

16,giải phương trình sau.

1, \(\frac{\frac{x-3}{5}+1}{4}=\frac{\frac{2x}{3}-\frac{1}{2}}{6}\)

2, \(\frac{5x+\frac{x+2}{2}}{9}-x=\frac{\frac{x+3}{5}+15}{12}-2\)

3, 5x+\(\frac{\frac{x+2}{2}}{9}-x=\frac{\frac{x+3}{5}+15}{12}-2\)

15, giải pt sau.

1,\(\frac{3\left(x+3\right)}{4}+\frac{1}{2}=\frac{5x+9}{3}-\frac{7x-9}{4}\)

2,​\(\frac{2x-3}{3}-\frac{x-3}{6}=\frac{4x+3}{5}-17\)​​

3,\(\frac{5x-1}{6}+\frac{2\left(x+4\right)}{9}=\frac{7x-5}{15}+x-1\)

\(\frac{2x-3}{3}-\frac{x-3}{6}=\frac{4x+3}{5}-17\)​

15 ,giải phương trình.

1,\(\frac{3x-7}{5}=\frac{2x-1}{3}\)

2,\(\frac{3x-7}{2}+\frac{2x-1}{3}=-16\)

3,x-\(\frac{x+1}{3}=\frac{2x+1}{5}\)

4,\(\frac{7-3x}{12}+\frac{3}{4}=2\left(x-2\right)\) +\(\frac{5-\left(5-2x\right)}{6}\)

5,\(\frac{2x-1}{3}-\frac{5x+2}{7}=x+13\)