Write an algebraic equation for the following problem and then solve it. Creekside dormitory just purchased a new sofa on sale for $406. The sale price was 70% of the original price. What was the original price of the sofa?

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Q: $7 less than twice his sister's, which equation can be used to determine his sister salary?

A: $7 less than twice his sister's salary. Which equation can be used to determine his sister salary?

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Q: 40% OFF!   The sale price of a microwave is $54. What was the original price?

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Q: 6. You and four friends go to Johnny Rockets. You all split the bill equally. Each person's share…

A: you and your friends go to Johnny Rockets.You all split the bill equally.Each person's share was…