document.write( "Question 507873: -6p - 21 = 3p - 12 \n" ); document.write( "
Algebra.Com's Answer #340770 by Maths68(1474)\"\" \"About 
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-6p - 21 = 3p - 12
\n" ); document.write( "Add 21 both sides of the above equation
\n" ); document.write( "-6p - 21+21 = 3p - 12 + 21
\n" ); document.write( "Cancel out 21 from left hand side
\n" ); document.write( "-6p = 3p + 9
\n" ); document.write( "Subtract 3p from both sides of the above equation
\n" ); document.write( "-6p -3p = 3p - 3p + 9
\n" ); document.write( "Cancel out 3p from right hand side
\n" ); document.write( "-9p =9
\n" ); document.write( "Divide by -9 both sides of the above equation
\n" ); document.write( "-9p/-9 =9/-9
\n" ); document.write( "Cancel out 9 from both sides
\n" ); document.write( "p=-1\r
\n" ); document.write( "\n" ); document.write( "Check
\n" ); document.write( "Put the value of p in original equation
\n" ); document.write( "-6p - 21 = 3p - 12
\n" ); document.write( "-6(-1) - 21 = 3(-1) - 12
\n" ); document.write( "6-21=-3-12
\n" ); document.write( "-15=-15\r
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