document.write( "Question 117409: given f(x)=3x+3, find f(a+1) \n" ); document.write( "
Algebra.Com's Answer #85405 by jim_thompson5910(35256)\"\" \"About 
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\"f%28x%29=3x%2B3\" Start with the given function.\r
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\n" ); document.write( "\n" ); document.write( "\"f%28a%2B1%29=3%28a%2B1%29%2B3\" Plug in x=a+1\r
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\n" ); document.write( "\n" ); document.write( "\"f%28a%2B1%29=3a%2B3%2B3\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"f%28a%2B1%29=3a%2B6\" Combine like terms
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