Question

18. If 21-7 X5n-4 =1250, find the value of n.
Hint: 21-4x2-3x 51-4 = 1250
2-4 x 5n-4
=1250 = (2x5)n-4
(2x5)-4 = (10)
23​

Answer 1

Answer:

14×5n-4=1250

14×5n=1254

5n=1254/14

5n=89.57

n=17.914

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