document.write( "Question 240985: three times one number plus -7 times another number equals 21 \n" ); document.write( "

Algebra.Com's Answer #176647 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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three times one number plus -7 times another number equals 21
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\n" ); document.write( "3x + -7y = 21
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\n" ); document.write( "3x - 7y = 21
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\n" ); document.write( "-7y = -3x + 21
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\n" ); document.write( "Multiply by -1
\n" ); document.write( "7y = 3x - 21
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\n" ); document.write( "y = $\"3%2F7\"$ x - $\"21%2F7\"$
\n" ); document.write( "y = $\"3%2F7\"$ x - 3
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\n" ); document.write( "Some integer values, ignoring 0;
\n" ); document.write( "x=14, y=3
\n" ); document.write( "x=21 y=6
\n" ); document.write( "x=28 y=9
\n" ); document.write( "x=35 y=12
\n" ); document.write( "note as x increases by 7, y increase by 3 \n" ); document.write( "

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