Respuesta :
An equation is formed when two equal expressions. The present age of Will and Jill is 18 and 9, respectively.
What is an equation?
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
Let the age of Will be represented by x, while the age of Jill is represented by y. Given Will is twice as old as Jill. Therefore,
x = 2y
Also, Three years ago, Jill's age was two fifths of Will's age then.
(2/5)(x-3) = (y-3)
(2x/5) - (6/5) = y-3
Substitute the value of x from above,
(4y/5) - (6/5) = (y-3)
(4y - 6)/5 = (y-3)
(4y - 6) = 5y - 15
-6 + 15 = 5y - 4y
9 = y
x = 2y = 2(9) = 18
Hence, the present age of Will and Jill is 18 and 9, respectively.
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