document.write( "Question 144847: the sum of the ages of petra and her mother is 45. her mother is 9 years more than twice as old as petra. how old are petra and her mother \n" ); document.write( "
Algebra.Com's Answer #105557 by shahid(44)![]() ![]() ![]() You can put this solution on YOUR website! let x years be the age of petra and y be the age of her mother.according to conditions \n" ); document.write( "x+y=45 .......(1) \n" ); document.write( "y=2x+9........(2) from this equ: y=2x+9 putting in equ:(1) \n" ); document.write( "x+2x+9=45 \n" ); document.write( "3x=45-9 \n" ); document.write( "3x=36 \n" ); document.write( "x=12 putting this in equ:2 \n" ); document.write( "y=2(12)+9 \n" ); document.write( "y=33 \n" ); document.write( "hence petra's age is 12 and her mother's age is 33 \n" ); document.write( " |