document.write( "Question 1030833: y=4x+1
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Algebra.Com's Answer #645606 by ikleyn(52797) $\"\"$ $\"About$

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document.write( "y = 4x + 1,   (1)\r\n" );
document.write( "y =  x + 4.   (2)\r\n" );
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document.write( "Since left sides of these equations are identical (y's), their right sides are equal.\r\n" );
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document.write( "So you have a single equation for x to solve:\r\n" );
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document.write( "4x + 1 = x + 4.    (notice: this is the same as to make a substitution for y).\r\n" );
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document.write( "3x = 3,\r\n" );
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document.write( "x = 1.\r\n" );
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document.write( "Then y = 5.\r\n" );
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