document.write( "Question 1208770: y=-x+7 and y=x+1 \n" ); document.write( "

Algebra.Com's Answer #847210 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "They want you solve this system of two equations in two unknowns\r\n" );
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document.write( "    y = -x + 7\r\n" );
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document.write( "    y =  x + 1.\r\n" );
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document.write( "Add these equations (side by side).  You will get\r\n" );
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document.write( "    2y = 7 + 1\r\n" );
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document.write( "    2y = 8\r\n" );
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document.write( "     y = 8/2 = 4.\r\n" );
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document.write( "Now substitute this found value y= 4 into the second given equation.  You will get\r\n" );
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document.write( "    4 = x + 1.\r\n" );
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document.write( "It implies  \r\n" );
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document.write( "    4 - 1 = x.\r\n" );
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document.write( "    x = 3.\r\n" );
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document.write( "ANSWER.  The solution to the given problem is  x= 3,  y= 4.\r\n" );
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document.write( "You may check that the solution is correct by substituting the values into the original equations.\r\n" );
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