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Problem Num : 21 Type: Section:Equation  Theme:None Adjustment# : 10 Difficulty: 1
Category	System of Equations
Analysis
Solution/Answer	Answer: D

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Problem Num : 22 Type: Section:Equation  Theme:None Adjustment# : 12 Difficulty: 1
Category	System of Equations
Analysis
Solution/Answer	Answer: E

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Problem Num : 23 Type: Section:Equation  Theme:None Adjustment# : 13 Difficulty: 1
Category	System of Equations
Analysis	there are two vars.
Solution/Answer	Answer: B

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Problem Num : 24 Type: Section:Equation  Theme:None Adjustment# : 14 Difficulty: 1
Category	System of Equations
Analysis	pn=120 and (p+1)(n-10)=120
Solution/Answer	Answer: C

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Problem Num : 25 Type: Section:Equation  Theme:None Adjustment# : 15 Difficulty: 1
Category	System of Equations
Analysis
Solution/Answer	Answer: E

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Problem Num : 26 Type: Section:Equation  Theme:None Adjustment# : 16 Difficulty: 1
Category	System of Equations
Analysis	Three equation required to get three vars. s-c=p. (1)0.2s=p (2)c+50=s
Solution/Answer	Answer: C

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Problem Num : 27 Type: Section:Equation  Theme:None Adjustment# : 17 Difficulty: 1
Category	System of Equations
Analysis	(1)0.6*(a+b) =b (2)a+2b=120
Solution/Answer	Answer: C

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Problem Num : 28 Type: Section:Equation  Theme:None Adjustment# : 18 Difficulty: 1
Category	System of Equations
Analysis	(1)s+l=42 (2)2l=46
Solution/Answer	Answer: C

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Problem Num : 29 Type: Section:Equation  Theme:None Adjustment# : 19 Difficulty: 1
Category	System of Equations
Analysis
Solution/Answer	Answer: A

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Problem Num : 30 Type: Section:Equation  Theme:None Adjustment# : 20 Difficulty: 1
Category	System of Equations
Analysis
Solution/Answer	Answer: C

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Array ( [0] => 4771 [1] => 4704 [2] => 4714 [3] => 4814 [4] => 4818 [5] => 4875 [6] => 4911 [7] => 4919 [8] => 4984 [9] => 4616 ) 361  2  3  4