document.write( "Question 598172: Bryan is twice as old as Colin. Colin is 4 years younger then Michael. In three years bryan Colin and Michael will be 2 more than half a century.how old are they now? \n" ); document.write( "
Algebra.Com's Answer #378541 by ankor@dixie-net.com(22740)\"\" \"About 
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let b = Bryan's present age
\n" ); document.write( "let c = Colin's \"
\n" ); document.write( "let m = Micheal's \"
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "\"Bryan is twice as old as Colin.\"
\n" ); document.write( "b = 2c
\n" ); document.write( ":
\n" ); document.write( "\"Colin is 4 years younger then Michael.\"
\n" ); document.write( "c = m - 4
\n" ); document.write( "or
\n" ); document.write( "m = c + 4
\n" ); document.write( ":
\n" ); document.write( "\"In three years bryan Colin and Michael will be 2 more than half a century.\"
\n" ); document.write( "(b+3) + (c+3) + (m+3) = 52
\n" ); document.write( "b + c + m + 9 = 52
\n" ); document.write( "b + c + m = 52 - 9
\n" ); document.write( "b + c + m = 43
\n" ); document.write( "Replace b with 2c, replace m with (c+4)
\n" ); document.write( "2c + c + (c+4) = 43
\n" ); document.write( "4c = 43 - 4
\n" ); document.write( "4c = 39
\n" ); document.write( "c = 39/4
\n" ); document.write( "c = 9.75 yrs is Colin's present; usually expect an integer, but here it is
\n" ); document.write( ":
\n" ); document.write( "b = 2(9.75)
\n" ); document.write( "b = 19.5 yrs is Bryan's present age
\n" ); document.write( ":
\n" ); document.write( "m = 9.75 + 4
\n" ); document.write( "m = 13.75 yrs is Michael's present age\r
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