Saturday, 19 September 2015

EXPONENTIALS 1



If 32y-4 = 128y ; find y

Solution

32y-4 = 128y

(25)y-4= (27)y

25y-20 = 27y

25y-20 = 27y

5y – 20 = 7y

5y – 7y = 20

-2y = 20

  - 2y   =  20
  - 2        -2

y = -10

Hence y = -10

TRY THIS……………….


If 16w-6 = 128w ; find w

No comments:

Post a Comment