document.write( "Question 350658: how do I solve 3x+5y+7z=75 for x,y and z? \n" ); document.write( "
Algebra.Com's Answer #250628 by Fombitz(32388)\"\" \"About 
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With one equation and three unknowns you can only solve for one variable in terms of the other two.
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\n" ); document.write( "To solve for three unknowns, you need 3 independent equations.
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