Question

question no 4


please tell me fast..
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Answer 1

Answer:

x=11

Step-by-step explanation:

write everything in the form of powers of 5 and 4

so you will get 125=5^3

64=4^3

25=5^2 and 16=4^2

substituting and using the laws of indices

(5/4)^(x-3)= (5/4)^8

thus x-3=8

so x=11

Answer 2

Answer:

(5/4)^x÷125/64=(25/16)^4

(5/4)^x÷(5/4)^3=(5/4)^8

(5/4)^x-3=(5/4)^8

Therefore, x-3=8

x=8+3

x=11.

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