Solve the equation graphically: 12x-7y=-6 5x-7y=27
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Domain of 
are the values of x for which 2x + 1 < 0
2x < -1
x < -1/2
Therefore, domain is all real numbers less than -1/2
2x < -1
x < -1/2
Therefore, domain is all real numbers less than -1/2