document.write( "Question 284049: solve this system of equations algebraically :
\n" ); document.write( "x^2+y^2=25, 4y=3x
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Algebra.Com's Answer #206284 by hello_me(3)\"\" \"About 
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ok so we have our two equations. so why not sub in y? so we have 4y=3x
\n" ); document.write( "so y=3x/4
\n" ); document.write( "when we sub that in we get x^2+9x^2/16 =25
\n" ); document.write( "now to get rid of our fraction mulitply ecverything by 16
\n" ); document.write( "and we get
\n" ); document.write( "16x^2+9x^2 = 400
\n" ); document.write( "we then get 25x^2 = 400
\n" ); document.write( "so x^2 = 16
\n" ); document.write( "there fore x can equal 4 or -4
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