A student bought a calculator and a textbook for a course in algebra. He told his friend that the total...

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A student bought a calculator and a textbook for a course in algebra. He told his friend that the total cost was $115 (wihtout tax) and that the calculator cost $10 more than four times the cost of the textbook. What was the cost of each item? Let C=the cost of a calculator and T= the cost of the textbook.

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