Question

If (a, 3) is the point lying on the graph of the equation 5x + 2y = $-$ 4 , then find a.

Answer 1

Point (a,3) lies on the graph of equation 5x + 2y = $-$4.
Then point (a,3) will satisfy the equation 5x + 2y = $-$4.

$$\begin{gathered} \mathrm{Now},5\times a+2\times 3=-4 \\ \Rightarrow 5a+6=-4 \\ \Rightarrow 5a=-4-6 \\ \Rightarrow 5a=-10 \\ \Rightarrow a=\frac{-10}{5} \\ \therefore a=-2 \end{gathered}$$