Question

Solve the following simultaneous equations using graphical method:
$x+y=10,x-y=6$.

Answer 1

$x+y=10$
$y=10-x$

$x$	$6$	$5$	$4$
$y$	$4$	$5$	$6$
$x,y$	$(6,4)$	$(5,5)$	$(4,6)$

$x-y=6$
The point of intersection are $(8,2)$
$\therefore$ $x=8,y=2$