Answers

2016-02-18T17:56:07+08:00
2(3y)+3(2)= 2(3(2))+3(2) 2(6)+6 12+6 =18?
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2016-02-18T18:03:10+08:00
Substitute
2(6) + 3(2)
12 + 6 = 18 
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