document.write( "Question 756622: solve the pair of linear equation:
\n" ); document.write( "3x- y+7/11 +2=10; 2y +x+11/7 =10
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Algebra.Com's Answer #460451 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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solve the pair of linear equation:
\n" ); document.write( "3x - y + 7/11 + 2 = 10
\n" ); document.write( "2y + x + 11/7 = 10
\n" ); document.write( "We can rearrange these equations to
\n" ); document.write( "3x - y + 7/11 = 8
\n" ); document.write( "x + 2y + 11/7 = 10
\n" ); document.write( "get rid of those annoying fractions
\n" ); document.write( "multiply the 1st equation by 11
\n" ); document.write( "multiply the 2nd equation by 7
\n" ); document.write( "33x - 11y + 7 = 88
\n" ); document.write( " 7x + 14y + 11 = 70
\n" ); document.write( "which is
\n" ); document.write( "33x - 11y = 81
\n" ); document.write( " 7x + 14y = 59
\n" ); document.write( "These are a pain, lets solve it graphically
\n" ); document.write( "-11y = -33x + 81
\n" ); document.write( "divide by -11
\n" ); document.write( "y = 3x - (81/11)
\n" ); document.write( "and
\n" ); document.write( "14y = -7x + 59
\n" ); document.write( "y = -(1/2)x + (59/14)
\n" ); document.write( "graph these two
\n" ); document.write( " $\"+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+3x-%2881%2F11%29%2C+-.5x%2B%2859%2F14%29%29+\"$
\n" ); document.write( "my calc calls this x = 3.308, y = 2.56 (checks out in the 1st equation)
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