When asked how old she was , saima replied in two years i will be twice as old as i was five years ago. How old is she ?with explanation
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Answer:
X = Her age
The equation is: X + 2 = 2 (x-5) => X = 12
She is 12!
How did I come to the equation?
in two years => X+ 2
I will be AS => this means an equal operator
Twice as old as I was 5 years ago
5 years ago => X-5
Twice as old as I was 5 years ago => 2*(X-5)
And everything together: X + 2 = 2 (x-5)
is understanding whether there will be a single parameter that is unknown or more.
If there is only one (like in this case) I find how to build one side of the equation, and then tackle the other side.
And the last little secret is then always to check your answer!
12 + 2 Equals 2*(12–5)? Yes
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