Oxygen
Xylophone
Xylitol
Foxy
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Yes, they can both be zero.
In expressions such as "x-y", both "x" and "y" can have any value. The value of "x-y" will depend on what the value of "x" and the value of "y" are.
-6
x - y = w Add y to both sides: x = w + y
For this problem, write it out... x-y=y... x=2y...8=2y...8/2=y...4=y First, I made both y's on the same side( I added a y to both sides). Then, I replaced the x with an 8. Then, I divide out the 2 from both sides. This leaves me with 4=y So... x=8, y=4, 8-4=4