document.write( "Question 643087: 3(a-7)-3(2a-4)=4(a+3) \n" ); document.write( "
Algebra.Com's Answer #404329 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"3%28a-7%29-3%282a-4%29=4%28a%2B3%29\" Start with the given equation.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"3a-21-6a%2B12=4a%2B12\" Distribute.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"-3a-9=4a%2B12\" Combine like terms on the left side.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"-3a=4a%2B12%2B9\" Add \"9\" to both sides.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"-3a-4a=12%2B9\" Subtract \"4a\" from both sides.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"-7a=12%2B9\" Combine like terms on the left side.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"-7a=21\" Combine like terms on the right side.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"a=%2821%29%2F%28-7%29\" Divide both sides by \"-7\" to isolate \"a\".\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"a=-3\" Reduce.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "----------------------------------------------------------------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Answer:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So the solution is \"a=-3\"
\n" ); document.write( "
\n" ); document.write( "
\n" );