Question

(ii) 2x + y = 5; 3x $-$ y = 5

Answer 1

$$\begin{gathered} \left(\mathrm{ii}\right)2x+y=5...\left(1\right) \\ 3x-y=5...\left(2\right) \\ \mathrm{Adding}\left(1\right)\mathrm{and}\left(2\right) \\ 2x+y=5 \\ \underline{3x-y=5} \\ 5x=10 \\ \therefore x=2 \\ \mathrm{Substituting}x=2\mathrm{in}\mathrm{equation}\left(1\right) \\ \Rightarrow 2\times 2+y=5 \\ \Rightarrow y=1 \\ \therefore x=2\mathrm{and}y=1\mathrm{is}\mathrm{the}\mathrm{solution}\mathrm{of}\mathrm{the}\mathrm{given}\mathrm{equation}. \end{gathered}$$