Question

Solve each of the following systems of equations by the method of cross-multiplication :

$$\begin{gathered} ax+by=\frac{a+b}{2} \\ 3x+5y=4 \end{gathered}$$

Answer 1

GIVEN:

To find: The solution of the systems of equation by the method of cross-multiplication:

Here we have the pair of simultaneous equation

By cross multiplication method we get

And

Hence we get the value of and