document.write( "Question 308315: 21x+7<3x+16 \n" ); document.write( "

Algebra.Com's Answer #220441 by checkley77(12844) $\"\"$ $\"About$

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21x+7<3x+16
\n" ); document.write( "21x-3x<16-7
\n" ); document.write( "18x<9
\n" ); document.write( "x<9/18
\n" ); document.write( "x<1/2 or .5
\n" ); document.write( "Proof:
\n" ); document.write( "Let x=.49
\n" ); document.write( "21*.49+7<3*.49+16
\n" ); document.write( "10.29+7<1.47+16
\n" ); document.write( "17.29<17.47
\n" ); document.write( " \n" ); document.write( "

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