document.write( "Question 866: twenty-one is three times the difference between four times a number and five. find the number. \n" ); document.write( "

Algebra.Com's Answer #290 by usyim88hk(158) $\"\"$ $\"About$

You can put this solution on YOUR website!
First, make an equation!!!
\n" ); document.write( "Let the number be x:
\n" ); document.write( " $\"21=%28%284%2Ax%29-5%29%2A3\"$ or $\"21=%285-%284%2Ax%29%29%2A3\"$ (Let's slove the first one first)
\n" ); document.write( "------------------------------------------------------------------------------
\n" ); document.write( "First equation:
\n" ); document.write( " $\"21%2F3=%284x-5%29%2A3%2F3\"$
\n" ); document.write( "7 = 4x-5
\n" ); document.write( "7+5 = 4x-5+5
\n" ); document.write( "12 = 4x
\n" ); document.write( "[x = 3]
\n" ); document.write( "------------------------------------------------------------------------------
\n" ); document.write( "Second equation:
\n" ); document.write( " $\"21%2F3+=+%285-4x%29%2A3%2F3\"$
\n" ); document.write( "7 = 5-4x
\n" ); document.write( "7+4x = 5
\n" ); document.write( "4x = -2
\n" ); document.write( "[x = -1/2 or -0.5]
\n" ); document.write( "------------------------------------------------------------------------------
\n" ); document.write( "[x = 3 or -0.5] (ANSWER!!!!) \n" ); document.write( "

\n" );