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Mathematics 15 Online
OpenStudy (anonymous):

The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 1120. If three times the number of one-step equations minus twice the number of two-step equations is equal to 1300, how many two-step equations auditioned today?

OpenStudy (anonymous):

There are two unknowns - number of one- and two-step equations. Call them o and t. So, what do we know about o and t? They add up to 1120. We also know from the later sentence that thrice o minus twice t equals 1300. Two equations and two unknowns. Time to solve them simultaneously.

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