Question

solve by elimination method x+2y=7,x-2y=1

Answer 1

x+2y= 7......1
x-2y=1 ......2
$x + 2y = 1 \\ x - 2y = 1 \\ 2x = 8 \\ x = 4$
put x=4 in 1
$4 + 2y = 7 \\ 2y = 7 - 4 \\ 2y = 3 \\ y = 3/2$
Therefore (x,y) (4,3/2)

Answer 2

let X+2Y=7 be the equation one 
and X-2Y=1 be the equation 2
X+2Y=7
X-2Y=1
_______
2X=8
X=4
and substitute x value in eq 1,we gwt
Y=3/2=1.5