document.write( "Question 136988: 4z+12=7z-9 \n" ); document.write( "

Algebra.Com's Answer #100258 by checkley77(12844) $\"\"$ $\"About$

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4z+12=7z-9
\n" ); document.write( "4Z-7Z=-9-12
\n" ); document.write( "-3Z=-21
\n" ); document.write( "Z=-21/-3
\n" ); document.write( "Z=7 ANSWER.
\n" ); document.write( "PROOF
\n" ); document.write( "4*7+12=7*7-9
\n" ); document.write( "28+12=49-9
\n" ); document.write( "40=40 \n" ); document.write( "

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