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#
Twenty less than ten times a certain number is 600. Find the number.

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Question:

A
62

explanation

Let x represent the unknown number. Set up an equation.

10x −20 = 600

Solve the equation. Add 20 to both sides, then divide the resulting equation by 10.

10x −20 = 600

10x − 20 + 20 = −600 + 20

10x = 620

10x ÷ 10 = 620 ÷ 10

x = 62

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