document.write( "Question 1135047: Mr. chittocks political button collection currently has 840 buttons. This represents a 12% increase over his total collection of 3 years ago. Determine how many buttons were in his collection 3 years ago \n" ); document.write( "
Algebra.Com's Answer #752563 by ikleyn(52943)\"\" \"About 
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document.write( "Let x be the number three years ago.\r\n" );
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document.write( "According to the condition, this number \"x\" is the base for the comparison,\r\n" );
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document.write( "so your equation is\r\n" );
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document.write( "    x*(1+0.12) = 840\r\n" );
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document.write( "    1.12x = 840\r\n" );
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document.write( "     x = 840/1.12 = 750.\r\n" );
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document.write( "ANSWER.  3 years ago the collection was 750 buttons.\r\n" );
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\n" ); document.write( "\n" ); document.write( "On percentage,  see the lessons \r
\n" ); document.write( "\n" ); document.write( "    - Percentage problems\r
\n" ); document.write( "\n" ); document.write( "    - Percentage word problems (Type 1 problems, Finding the Part)\r
\n" ); document.write( "\n" ); document.write( "    - Percentage word problems (Type 2 problems, Finding the Rate)\r
\n" ); document.write( "\n" ); document.write( "    - Percentage word problems (Type 3 problems, Finding the Base)\r
\n" ); document.write( "\n" ); document.write( "    - More complicated percentage problems\r
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