document.write( "Question 161878This question is from textbook
\n" ); document.write( ": -2[4-(3b+2)]=5-2(3b+6) \n" ); document.write( "

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-2[4-(3b+2)]=5-2(3b+6)
\n" ); document.write( "-2[4-3b+2]=5-6b-12
\n" ); document.write( "-2[6-3b]=-6b-7
\n" ); document.write( "-12+6b=-6b-7
\n" ); document.write( "6b+6b=-7+12
\n" ); document.write( "12b=5
\n" ); document.write( "b=5/12
\n" ); document.write( "proof:
\n" ); document.write( "-2[4-3*5/12+2]=5-2(3*5/12+6)
\n" ); document.write( "-2[4-15/12+2]=5-2(15/12+6)
\n" ); document.write( "-2[6-15/12]=5-30/12-12
\n" ); document.write( "-12+30/12=-7-30/12
\n" ); document.write( "30/12+30/12=-7+12
\n" ); document.write( "60/12=5
\n" ); document.write( "5=5
\n" ); document.write( " \n" ); document.write( "

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