document.write( "Question 215631: My mum was 27 when I was born. 8 years ago she was twice as old as I shall be in 5 years time. How old am I now? \n" ); document.write( "

Algebra.Com's Answer #162937 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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My mum was 27 when I was born.
\n" ); document.write( " 8 years ago she was twice as old as I shall be in 5 years time.
\n" ); document.write( " How old am I now?
\n" ); document.write( ":
\n" ); document.write( "m = mother's present age
\n" ); document.write( "c = child's present age
\n" ); document.write( ":
\n" ); document.write( "\"My mum was 27 when I was born.:
\n" ); document.write( "From this statement:
\n" ); document.write( "m = c + 27
\n" ); document.write( ":
\n" ); document.write( "\"8 years ago she was twice as old as I shall be in 5 years time.\"
\n" ); document.write( "m - 8 = 2(c + 5)
\n" ); document.write( "m - 8 = 2c + 10
\n" ); document.write( "m = 2c + 10 + 8
\n" ); document.write( "m = 2c + 18
\n" ); document.write( ";
\n" ); document.write( " How old am I now?
\n" ); document.write( "Replace m with (c+27) in the above equation
\n" ); document.write( "c + 27 = 2c + 18
\n" ); document.write( "27 - 18 = 2c - c
\n" ); document.write( "c = 9 yrs
\n" ); document.write( ":
\n" ); document.write( ";
\n" ); document.write( "Check solution: m = 9 + 27 = 36
\n" ); document.write( "\"8 years ago she was twice as old as I shall be in 5 years time.\"
\n" ); document.write( "36 - 8 = 2(9 + 5)
\n" ); document.write( "28 = 2(14) \n" ); document.write( "

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