jQuery vs Zepto Proble

[fantasma]

Greetings!

I'm at the moment stuck with something that would be very trivial, but, since I'm not that versed in jQuery and Zepto I can't figure out a way to solve it.

I need to animate a slider

With jQuery everything works fine

$('.slider').animate({
    left: '-=1024px'
    },500);
}

But with Zepto, as it doesn't supports the '+=' property, it only slides the first two images!

$('.slider').anim({
    translate3d: '-1024px,0px,0px'
},1,'linear');
}

Can I have some help / directions ?

Thank you!