Here it is:

xy- 2Z +x 25
y+ x+ z =30
X+ X+ y =20

How many are Y and Z

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.