document.write( "Question 71885This question is from textbook
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Algebra.Com's Answer #51436 by rmromero(383) $\"\"$ $\"About$
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document.write( "To solve for systems of equation by graphing, we must graph each equation.
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document.write( "Find the intersection.\r
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document.write( "To graph each equations, we can do it in three ways.
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document.write( "1. Making tables.
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document.write( "  assuming values of x and substitute it to the equation to find y.\r
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document.write( "                   3x - 6y = 9
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document.write( "   x              y     
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document.write( "  -1              2       
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document.write( "   1             -1  
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document.write( "   3              0 \r
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document.write( "When x = -1 , y is 3(-1) - 6y = 9
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document.write( "                      -3 - 6y = 9
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document.write( "                          -6y = 9 + 3
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document.write( "                          -6y = 12
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document.write( "                            y = -2   \r
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document.write( "When x = 1, y is 3(1) - 6y = 9
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document.write( "                    3 - 6y = 9
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document.write( "                       -6y = 9 - 3
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document.write( "                       -6y = 6
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document.write( "                         y = -1\r
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document.write( "When x = 3, y is 3(3) - 6y = 9
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document.write( "                    9 - 6y = 9
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document.write( "                       -6y = 9 - 9
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document.write( "                       -6y = 0
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document.write( "                         y = 0\r
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document.write( "                              x - 2y = 3\r
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document.write( "          x                y
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document.write( "          -3              -3       
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document.write( "          1               -1
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document.write( "          3                0          \r
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document.write( "When x = -2, y is -3 - 2y = 3 
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document.write( "                     -2y = 3 + 3
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document.write( "                     -2y = 6
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document.write( "                       y = -3  \r
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document.write( "When x = 1, y is 1 - 2y = 3
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document.write( "                   -2y = 3 - 1
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document.write( "                    -2y = 2
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document.write( "                      y = -1     \r
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document.write( "When x = 3y is 3 - 2y = 3
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document.write( "                  -2y = 3 - 3
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document.write( "                  -2y = 0
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document.write( "                    y = 0 \r
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document.write( "Then graph each equation\r
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document.write( "The graph are the same. therefore, the solution are infinite. (many solution) \n" );
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