document.write( "Question 602276: Two years ago, a father was 8 times as old as his son. Ten years from now, the ratio of their ages will be 10:3. What is the father's age today?\r
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Algebra.Com's Answer #380181 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
let f = father's present age
\n" ); document.write( "let s = son's present age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement:
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\n" ); document.write( "\"Two years ago, a father was 8 times as old as his son.\"
\n" ); document.write( "f - 2 = 8(s-2)
\n" ); document.write( "f - 2 = 8s - 16
\n" ); document.write( "f = 8s - 16 + 2
\n" ); document.write( "f = 8s - 14
\n" ); document.write( ":
\n" ); document.write( "\" Ten years from now, the ratio of their ages will be 10:3.\"
\n" ); document.write( "\"%28%28f%2B10%29%29%2F%28%28s%2B10%29%29\" = \"10%2F3\"
\n" ); document.write( "cross multiply
\n" ); document.write( "3(f+10) = 10(s+10)
\n" ); document.write( "3f + 30 = 10s + 100
\n" ); document.write( "3f = 10s + 100 - 30
\n" ); document.write( "3f = 10s + 70
\n" ); document.write( "Replace f with (8s-14)
\n" ); document.write( "3(8s-14) = 10s + 70
\n" ); document.write( "24s - 42 = 10s + 70
\n" ); document.write( "24s - 10s = 70 + 42
\n" ); document.write( "14s = 112
\n" ); document.write( "s = 112/14
\n" ); document.write( "s = 8 yrs is son's age
\n" ); document.write( "then
\n" ); document.write( "f = 8(8) - 14
\n" ); document.write( "f = 64 - 14
\n" ); document.write( "f = 50 yrs is father's age today\r
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