( a )Solve the equation 8x+7=13(x-1)
( b )Using the result of ( a ),solve the equation 8/y+7=13(1/y-1).
maths
2007-05-13 6:36 am
回答 (1)
2007-05-13 6:47 am
✔ 最佳答案
(a) Ans : x = 48x + 7 = 13( x - 1 )
8x + 7 = 13x - 13
5x = 20
x = 4
(b) Ans : y = 1/4
Put x = 1/y
8/y + 7 = 13( 1/y - 1 )
8x + 7 = 13( x - 1 )
So, 4 = 1/y
y = 1/4
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