Question

solve the following linear equations.
2) n/2 - 3n/4 + 5n/6 = 21

Answer 1

$$\begin{gathered} \frac{\mathrm{n}}{2}-\frac{3\mathrm{n}}{4}+\frac{5\mathrm{n}}{6}=21 \\ \frac{6\mathrm{n}-9\mathrm{n}+10\mathrm{n}}{12}=21 \\ \frac{16\mathrm{n}-9\mathrm{n}}{12}=21 \\ \frac{7\mathrm{n}}{12}=21 \\ \mathrm{n}=\frac{21\times 12}{7} \\ \mathrm{n}=3\times 12 \\ \mathrm{n}=36\mathrm{ANS}... \end{gathered}$$