RuiFeng is twice as old as Raj and Khairul is 7 years younger than RuiFeng. If the sum of their ages is 38 years, find their res
2 answers:
You might be interested in
we have
we know that
If the point is an equation solution, it must satisfy the equation.
<u>case a</u>)
Substitute the values of x and y in the equation
-------> the point is not solution of the equation
<u>case b</u>)
Substitute the values of x and y in the equation
-------> the point is solution of the equation
<u>case c</u>)
Substitute the values of x and y in the equation
-------> the point is not solution of the equation
<u>case d</u>)
Substitute the values of x and y in the equation
-------> the point is not solution of the equation
therefore
<u>the answer is</u>
The point is solution of the equation