document.write( "Question 156457: 
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document.write( "Given: RS=ST                    .---------.---------.\r\n" );
document.write( "Prove: RT=2ST                   R          S         T\r\n" );
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document.write( "What are the Statements and Reasons for this proof?
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Algebra.Com's Answer #115267 by Edwin McCravy(20060)\"\" \"About 
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Given: RS=ST .---------.---------.
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document.write( " Statements               Reasons\r\n" );
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document.write( "1. RT = RS + ST          1. A whole is equa1 to the sum of its parts.\r\n" );
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document.write( "2. RS = ST               2. Given\r\n" );
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document.write( "3. RT = ST + ST          3. A quantity may be substituted for its equal.\r\n" );
document.write( "                           (Substitution postulate) (We are substituting\r\n" );
document.write( "                           ST for RS in step 1.)\r\n" );
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document.write( "4. ST + ST = 2ST         4.    1+1=2\r\n" );
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document.write( "5. RT = 2ST              5  A quantity may be substituted for its equal.\r\n" );
document.write( "                           (Substitution postulate) (We are substituting\r\n" );
document.write( "                           2ST for ST + ST in step 3.)\r\n" );
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document.write( "Edwin

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