document.write( "Question 103825: in 4 years Daniel's age will be the same as Justin's age now. In 2 years,Justin will be twice as old as Daniel. Find their ages now. \n" ); document.write( "
Algebra.Com's Answer #75532 by ankor@dixie-net.com(22740)\"\" \"About 
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In 4 years Daniel's age will be the same as Justin's age now. In 2 years, Justin will be twice as old as Daniel. Find their ages now.
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\n" ); document.write( "Let D = Daniels age now; J = Justin's age now
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\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "\"In 4 years Daniel's age will be the same as Justin's age now.\"
\n" ); document.write( " D + 4 = J
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\n" ); document.write( " \"In 2 years,Justin will be twice as old as Daniel.\"
\n" ); document.write( " J + 2 = 2(D + 2)
\n" ); document.write( " J + 2 = 2D + 4
\n" ); document.write( " J = 2D + 4 - 2
\n" ); document.write( " J = 2D + 2
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\n" ); document.write( "Find their ages now.
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\n" ); document.write( "From the 1st statement; substitute (D+4) for J in the above equation, find D:
\n" ); document.write( "D + 4 = 2D + 2
\n" ); document.write( "4 - 2 = 2D - D
\n" ); document.write( "D = 2 yrs old now
\n" ); document.write( "Then
\n" ); document.write( "J = 2 + 4 = 6 yrs old now
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\n" ); document.write( "Check our solution in the statement:
\n" ); document.write( " \"In 2 years,Justin will be twice as old as Daniel.\"
\n" ); document.write( " 6 + 2 = 2(2+2)
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\n" ); document.write( "Did this make sense to you?
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