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So long as both safe/not wrecked yes*
*If your car uses the ABS sensors to calculate if you've got an underinflated tyre, then you'll get the tyre pressure light on.
And during ABS braking, it might act a bit weird. On Volvo I ran larger tyre circumference on front to rear, good for whatever reason I told myself at the time, but under ABS braking (old school 3 channel, 1 for FL, 1 for FR and 1 for rear axle total) it thought the front was locking, so would take the line pressure off them. I soon went back to tyres that matched.
To sum it up - can I move the unevenly worn tyres to the back, or will that cause instant death? I'm not on @Dammit levels of perfection but want a safe car