单选题If 2y/7 = y+3 /4,then y =A5B9C13D17E21
单选题
If 2y/7 = y+3 /4,then y =
A
5
B
9
C
13
D
17
E
21
参考解析
解析:
If 2y/7 = y+3/4, set the cross-products equal and then solve the resulting equation. 2y/7 = y+3/4. y=21.
If 2y/7 = y+3/4, set the cross-products equal and then solve the resulting equation. 2y/7 = y+3/4. y=21.
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