Answers

2016-02-01T16:27:17+08:00
The product of the means and the extremes must be equal. 

1.)  15(2)=3x\\ \frac{30}{3} = \frac{3x}{3} \\10=x\\checking:\\15:10=3:2\\15(2)=3(10)\\30=30

2.) 9x=63(7)\\ \frac{9x}{9} = \frac{441}{9} \\x=49\\checking:\\49:7=9:63\\49(9)=63(7)\\441=441

Answers:
1.) x = 10
2.) x = 49
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