If y=-4 when x=10 find y when x=2

X = y x z

10 = (-4) x z

Z = - 10/4 = - 5/2

So now we know z = - 5/2

we can find y when x = 2

Again x = y x z

2 = y x (-5/2)

So y = 2 x (-2/5) = - 4/5

Double check:

x = yx (x = 2, y = - 4/5), z = - 5/2)

2 = (-4/5) x (-5/2) = 20/10 = 2

Answer: when x = 2, y = - 4/5