If AE is x+50 then the whole thing must be x=50, If a portion of that, CE, is x+32, then the rest of it, AC, must be x+18, because no matter what X is, 32+18=50.
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Hydrosphere and atmosphere. those are the only 2 spheres that interact with each other in the air.
Answer:
8 plants in the solar system
Iraq it has boundarys that are arbitrarily drawn, with no real common bondage among the people.