Question 1147327
.


            I will show you TWO WAYS to solve the problem.



<U>1-st way</U>


<pre>
If P is the Peter's age, then (P-7) is the Wendy's age.


From the condition,


    P + (P-7) = 63,

    2P = 63 + 7 = 70,

     P =        = 70/2 = 35.


<U>ANSWER</U>.  Peter is 35 years old.
</pre>


<U>2-nd way</U>


<pre>
From the condition, you have these two equations

    
    P + W = 63

    P - W =  7


Add the equations and see what will happen.
</pre>