Question 1144370
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<pre>
Let  "x"  be her age now.


Then in 8 years her age will be (x+8) years.



From the other side, "twice her present age" is (2x), and 

"3 years more than twice her present age" is this value  (2x+3).



According to the condition, these two values are equal

    x + 8 = 2x + 3.


It is your equation, and you want to solve it to find x.


Collect the terms with x in the right side, and collect the constant terms in the left side, like this

    8 - 3 = 2x - x

    5 = x,

which gives you the answer: the girl is 5 years old now.
</pre>


It is a standard age word problem.


To solve a standard age word problem, &nbsp;always start the solution with this &nbsp;<U>mantra</U>:


<pre>
    Let x be the age under the question.


        Then the age in "n" ears will be (x+n),

        while the age  "m" years ago was (x-m).
</pre>

If you start the solution with the right words, &nbsp;then the logic inside your mind always will guide you in right direction.



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There is a bunch of lessons on age word problems 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/age/Age-problems-and-their-solutions.lesson>Age problems and their solutions</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/age/Fresh-formulation-of-a-traditional-age-problem.lesson>A fresh formulation of a traditional age problem</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/age/Really-intricate-age-word-problem.lesson>Really intricate age word problem</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/age/Selected-age-word-problems-from-the-archive.lesson>Selected age word problems from the archive</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/age/Age-problems-for-mental-solution.lesson>Age problems for mental solution</A> 

in this site.


Read them and become an expert in solving age problems.


Also, you have this free of charge online textbook in ALGEBRA-I in this site

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-I - YOUR ONLINE TEXTBOOK</A>.


The referred lessons are the part of this online textbook under the topic "<U>Age word problems</U>".



Save the link to this online textbook together with its description


Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson


to your archive and use it when it is needed.