document.write( "Question 1207639: 75+72+69+66+.....21+18+15 \n" ); document.write( "

Algebra.Com's Answer #845614 by MathLover1(20849) $\"\"$ $\"About$

You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( " $\"75%2B72%2B69%2B66\"$ +.....+ $\"21%2B18%2B15\"$ \r
\n" ); document.write( "\n" ); document.write( "pattern:
\n" ); document.write( "common difference is $\"3\"$ \r
\n" ); document.write( "\n" ); document.write( "1st term: $\"75\"$
\n" ); document.write( "2nd term: $\"75-3=72\"$
\n" ); document.write( "3rd term: $\"72-3=69\"$
\n" ); document.write( "4th term: $\"69-3=66\"$
\n" ); document.write( "5th term: $\"66-3=63\"$
\n" ); document.write( "6th term: $\"63-3=60\"$
\n" ); document.write( "7th term: $\"60-3=57\"$ \r
\n" ); document.write( "\n" ); document.write( "and so on\r
\n" ); document.write( "\n" ); document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );