How many four-digit whole numbers contain the digit pair "17" without other intervening digits? (Note that 2017 is one such exam
1 answer:
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ANSWER TO QUESTION 1
We multiply through by the Least Common Multiple which is 2.
We expand brackets to obtain,
Grouping like terms, have
Whenever you solve an equation and you get the above result, you don't have to get confuse.
It simply means the question does not have a UNIQUE solution.
That any real number will number will satisfy the above equation.
Hence,
ANSWER TO QUESTION 2
We factor x to obtain;
We divide both sides by (a+b)
We multiply through by the Least Common Multiple which is 2.
We expand brackets to obtain,
Grouping like terms, have
Whenever you solve an equation and you get the above result, you don't have to get confuse.
It simply means the question does not have a UNIQUE solution.
That any real number will number will satisfy the above equation.
Hence,
ANSWER TO QUESTION 2
We factor x to obtain;
We divide both sides by (a+b)
