SOLUTION: the sum of petra and her mother is 45. her mother is 12 years more than twice as old as petra. how old are petra and her mother?

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Question 34157: the sum of petra and her mother is 45. her mother is 12 years more than twice as old as petra. how old are petra and her mother?
Answer by Evy(14)   (Show Source): You can put this solution on YOUR website!
Hello, To solve this problem you must write an equation.


Petra=P and Petra's Mother=2p+12 so:

First add the like terms:

Now you have:

Subtract 12 from both sides of the equation.
+12 & -12 cancel out.
You are left with:
divide by 3


. P=11


We already know Petra is 11 yrs. old. To find out Petra's mother's age go to the original equation and plug in the solutions.
Petra's Mother=2p+12



First multiply:

Now you have: 22+12

Petra's Mother is 34 yr. old.


TO CHECK YOUR ANSWER:


Restate Original equation:


Now plug in the number:

Solve this problem like a normal equation.


First multiply:

Now you have:

continue to add the numbers:
when both sides of the equation are equal the answer is correct.


Hope you can understand this problem better now! If you have any questions e-mail me Southqueensb@yahoo.com
~EVY~

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