document.write( "Question 1132934: Mr.Santos is 25years older than his son, 8 years ago, he was 7 more than 10 times as old as his son.What are their present ages? \n" ); document.write( "

Algebra.Com's Answer #750096 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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let m = Mr Santos present age
\n" ); document.write( "let s = son's
\n" ); document.write( ":
\n" ); document.write( "write an equation for each statement
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\n" ); document.write( "Mr.Santos is 25years older than his son,
\n" ); document.write( "m = s + 25
\n" ); document.write( "8 years ago, he was 7 more than 10 times as old as his son.
\n" ); document.write( "m - 8 = 10(s - 8) + 7
\n" ); document.write( "m - 8 = 10s - 80 + 7
\n" ); document.write( "m = 10s - 73 + 8
\n" ); document.write( "m = 10s - 65
\n" ); document.write( "From the 1st equation, replace m with (s+25)
\n" ); document.write( "s + 25 = 10s - 65
\n" ); document.write( "25 + 65 = 10s - s
\n" ); document.write( "90 = 9s
\n" ); document.write( "s = 90/9
\n" ); document.write( "s = 10 yrs old is the son's present age
\n" ); document.write( "then
\n" ); document.write( "m = 10 + 25
\n" ); document.write( "m = 35 yrs is Mr Santos age now
\n" ); document.write( ":
\n" ); document.write( ";
\n" ); document.write( "Check this in the statement
\n" ); document.write( "\"8 years ago, he was 7 more than 10 times as old as his son.\"
\n" ); document.write( "35 - 8 = 10(10 - 8) + 7
\n" ); document.write( "27 = 10(2) + 7 \n" ); document.write( "

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