document.write( "Question 952520: 20 years ago Grandma was twice as old as Mum. Today, Grandma is twice the age Mum was when I was born. How old am I? \n" ); document.write( "
Algebra.Com's Answer #581722 by ankor@dixie-net.com(22740)\"\" \"About 
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let g = Grandma's age
\n" ); document.write( "let m = Mom's age
\n" ); document.write( "let y = your age
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\n" ); document.write( "Write an equation for each statement
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\n" ); document.write( "20 years ago Grandma was twice as old as Mum.
\n" ); document.write( "g - 20 = 2(m-20)
\n" ); document.write( "g - 20 = 2m - 40
\n" ); document.write( "g = 2m - 40 + 20
\n" ); document.write( "g = 2m - 20
\n" ); document.write( ":
\n" ); document.write( " Today, Grandma is twice the age Mum was when I was born.
\n" ); document.write( "g = 2(m-y)
\n" ); document.write( "g = 2m - 2y
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\n" ); document.write( "g = g
\n" ); document.write( "2m - 20 = 2m - 2y
\n" ); document.write( "Subtract 2m from both sides
\n" ); document.write( "-20 = -2y
\n" ); document.write( "y = -20/-2
\n" ); document.write( "y = 10 yrs old is your age \r
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