Hans Georg Schaathun
Oktober 2016
$$y = 10\cdot x - 100$$
$$y = 1080 - 12\cdot x $$
$$y = 436{,}3636$$
$$x = 53{,}63636$$
$$z = 20 + y + 2x$$
$$z = -50 + 2y - x$$
$$z = x - y$$
