document.write( "Question 285405: solving systems using substitution
\n" ); document.write( "y=4x+3
\n" ); document.write( "2x-3y+21
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Algebra.Com's Answer #206889 by richwmiller(17219)\"\" \"About 
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\n" ); document.write( "there is only one equation
\n" ); document.write( "otherwise substitute 4x+3 for y in the second but there is no second equation. Do you see an equal sign?
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