document.write( "Question 1062050: How many solutions does the system have?\r
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document.write( "x = -4y + 4
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document.write( "2x + 8y = 8 \n" );
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Algebra.Com's Answer #676824 by math_helper(2461)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Since the first equation can be written: x + 4y = 4 \n" ); document.write( "and then multiplying it by 2 gives: 2x + 8y = 8\r \n" ); document.write( "\n" ); document.write( "That equation matches the 2nd one, so you really only have one equation with two unknowns.\r \n" ); document.write( "\n" ); document.write( "In this case, there will be an infinite number of solutions:\r \n" ); document.write( "\n" ); document.write( " 2x+8y = 8 \n" ); document.write( " y = (1/8)(-2x + 8) \n" ); document.write( " y = -(1/4)x + 1 \n" ); document.write( "—\r \n" ); document.write( "\n" ); document.write( "So the solutions are all the points on the line y = -(1/4)x + 1. \n" ); document.write( "— \n" ); document.write( " \n" ); document.write( " |