exam Maths Puzzle Numerical Ability

In the year 2006 it was discovered that global population was increasing at the annual rate of 1.7%. In what year will the global population be double?

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Please gave me a step by step explanation/answers for the following three problems using the Absolute value of Equation. Thank you for your help

1. |2x-3|+5=26

2. |3x+5|=11

3. |3-2/5x|=9
Will someone please help me solve this problem? The problem says to divide using long division:(x^4+2x^3-16x^2+x+6)/(x-3)