document.write( "Question 877645: Grace is three years younger then her sister Jane. Twice the sum of their ages is 4 more
\n" ); document.write( "than their father’s age. If their father is 54, find the ages of Grace and Jane \n" ); document.write( "
Algebra.Com's Answer #529503 by ankor@dixie-net.com(22740)\"\" \"About 
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let g = G's age
\n" ); document.write( "let j = J's age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement
\n" ); document.write( ":
\n" ); document.write( "Grace is three years younger then her sister Jane.
\n" ); document.write( "g = j - 3
\n" ); document.write( "or
\n" ); document.write( "g - j = -3
\n" ); document.write( ":
\n" ); document.write( " Twice the sum of their ages is 4 more than their father’s age.
\n" ); document.write( " If their father is 54, find the ages of Grace and Jane
\n" ); document.write( "2(g+j) = 54 + 4
\n" ); document.write( "2g + 2j = 58
\n" ); document.write( "simplify, divide by 2, then add the 1st equation
\n" ); document.write( "g + j = 29
\n" ); document.write( "g - j = -3
\n" ); document.write( "-------------adding eliminates j, find g
\n" ); document.write( "2g = 26
\n" ); document.write( "g = 13 yrs is G's age
\n" ); document.write( "then
\n" ); document.write( "13 = j - 3
\n" ); document.write( "j = 16 is J's age \n" ); document.write( "
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