document.write( "Question 579924: In 10 years time Bill will be 30 years old. John will then be half of Bill's age. How old is John now?\r
\n" ); document.write( "\n" ); document.write( "I did the problem, either 10 + ? (20) = 30 divide 2 = 15.. 20-15 = 5 but how do you put it into picture form? Is this problem correct in form? \n" ); document.write( "
Algebra.Com's Answer #371100 by ankor@dixie-net.com(22740)\"\" \"About 
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In 10 years time Bill will be 30 years old.
\n" ); document.write( " John will then be half of Bill's age.
\n" ); document.write( " How old is John now?
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\n" ); document.write( "I'm not sure what \"picture form\" is but we can do it this way.
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\n" ); document.write( "let j = John's present age
\n" ); document.write( "Let b = Bill's present age
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "\"In 10 years time Bill will be 30 years old.\"
\n" ); document.write( "(b + 10) = 30
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\n" ); document.write( "\"John will then be half of Bill's age.\"
\n" ); document.write( "j + 10 = .5(b+10)
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\n" ); document.write( "From the 1st equation we can replace (b+10) with 30
\n" ); document.write( "j + 10 = .5(30)
\n" ); document.write( "j + 10 = 15
\n" ); document.write( "j = 15 -10
\n" ); document.write( "j = 5 yrs is John's present age\r
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