document.write( "Question 144227: select the next number in the series:
\n" ); document.write( "298 209 129 58 -4\r
\n" ); document.write( "\n" ); document.write( "choices are -13, -93, -66, -57 \n" ); document.write( "

Algebra.Com's Answer #105003 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!
select the next number in the series:
\n" ); document.write( " $\"298\"$ $\"+209\"$ $\"+129\"$ $\"+58\"$ $\"+-4+\"$ $\"...\"$ \r
\n" ); document.write( "\n" ); document.write( "let's find a pathern:\r
\n" ); document.write( "\n" ); document.write( " $\"298-+209=89\"$ ЕЕ..\r
\n" ); document.write( "\n" ); document.write( " $\"129+-58+=71\"$ ЕЕЕ \r
\n" ); document.write( "\n" ); document.write( " $\"58-%28+-4%29=62\"$ Е.\r
\n" ); document.write( "\n" ); document.write( "The difference between $\"89\"$ and $\"71\"$ is $\"2%2A9=18\"$ , the difference between $\"71\"$ and $\"62\"$ is $\"1%2A9=9\"$ ,the difference between $\"-4\"$ and next number $\"x\"$ will be also $\"1%2A9=9\"$ less than $\"62\"$ , so we can write an equation like this:\r
\n" ); document.write( "\n" ); document.write( " $\"-4-%28x%29=62-9\"$ Е.\r
\n" ); document.write( "\n" ); document.write( " $\"-4-%28x%29=53\"$ Е.\r
\n" ); document.write( "\n" ); document.write( " $\"-x=53%2B4\"$ Е.\r
\n" ); document.write( "\n" ); document.write( " $\"-x=57\"$ Е.\r
\n" ); document.write( "\n" ); document.write( " $\"x+=+-57\"$ ЕЕ.your $\"answer\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"298\"$ $\"+209\"$ $\"+129\"$ $\"+58\"$ $\"+-4+\"$ $\"-57\"$
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