document.write( "Question 156956: 3y=x-1 and 6y=x find a common solution for these two equations \n" ); document.write( "

Algebra.Com's Answer #115717 by gonzo(654) $\"\"$ $\"About$

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3y = x - 1
\n" ); document.write( "6y = x
\n" ); document.write( "can substitute 6y for x in the first equation.
\n" ); document.write( "so 3y = 6y - 1
\n" ); document.write( "-3y = -1
\n" ); document.write( "y = -1/-3 = 1/3.
\n" ); document.write( "using that value solve for x in either equation.
\n" ); document.write( "in the second equation, 6 * (1/3) = 2 = x, so x = 2.
\n" ); document.write( "in the first equation, 3 * (1/3) = 1 = x - 1, so x = 2 again (as it should).
\n" ); document.write( "answer is x = 2 and y = 1/3.
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