Modulo division

The modulo operation x mod y returns the remainder when x is divided by y. This remainder is related to integer division by the formula:

$y × (x // y) + (x mod y) = x$

So if x mod y = z, then:

$y × (x // y) + z = x$

Given x = 25 and y = 7, which pair of values for z and x // y satisfies this equation?