X + 3 = 2x +5
-x -5 = -x - 5
x = -2
The correct answer is: 3Explanation:
Instead of sharing the conventional tedious, method, let me share with you the simple trick here to solve these types of questions without using the calculator:
Given
It is essentially saying that WHAT power of 4(which is the base of log) gives us the value 64. You need to find the answer to that "WHAT."
Well
Hence the answer is "3".
Since 1/10=10^-1, and multiplying exponents with the same base just adds the actual exponents at the top, x=2