Thursday, October 3, 2013

UWIANO A-3




Ikiwa 5: (y-1) = 7: (y+2); Tafuta thamani ya y.

Suluhu

   5       =            7
(y-1)           (y+2)

5(y+2) = 7(y-1)

5y+10 = 7y - 7

10 + 7 =  7y-5y

17 = 2y

17 =   2y
 2        2

y = 81/2  

Hivyo thamani ya y ni 81/2  
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