document.write( "Question 1170355: S=n/2(a+b)
\n" ); document.write( " express b in terms of a,S,and n \n" ); document.write( "

Algebra.Com's Answer #795223 by Boreal(15235) $\"\"$ $\"About$

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I assume this is S=(n/2)(a+b)
\n" ); document.write( "2S/n=a+b
\n" ); document.write( "b=(2S/n)-a
\n" ); document.write( "-
\n" ); document.write( "let a=3 b=4 and n=20
\n" ); document.write( "S=70
\n" ); document.write( "4=(140/20)-a which is 7-3 \n" ); document.write( "

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