Garis 2x+y=3 ditranslasikan olehT=(2,1) kemudian dirotasikan R(O,90)

Garis 2x + y = 3
T(2,1)
x' = 2 + x
y'= 1 + y

Rotasi (O,90 )
x" = -y' = - (1+y) = -y - 1
y = -1 - x" ..(i)

y" = x' = 2 + x → x = y" - 2 ..(ii)

(i) ,(ii) substitusi ke  garis  2x + y = 3
2(y" - 2) + (-1 -x") = 3
2y - 4 - 1 - x = 3
2y - x - 5 = 3
2y - x = 8
x - 2y = -8