Four employees at a crayon factory are working on four separate machines. Cynthia's machine produces 100 less than twice the number of crayons as Zane's machine every hour. Louisa's machine produces 50 crayons more than Zane's machine every hour. Evan's machine produces 20 crayons less than Cynthia's machine every hour. How many crayons must Zane's machine produce every hour in order for Cynthia and Zane's output to equal Louisa and Evan's output?

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