Cross-Multiplication Method

Solve the following pairs of linear equations by cross- multiplication method:

$2bx+ay=2ab$

$bx-ay=4ab$

Solve the following pairs of linear equations by cross- multiplication method:

$x-y=a+b$

$ax+by=a^2-b^2$

Solve the following systems of simultaneous linear equations by the multiplication method:

$3x-7y+10=0$

$y-2x=3$

Solve the following systems of simultaneous linear equations by the multiplication method:-

$3x+2y=4$

$8x+5y=9$