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what type of system is the following set of equations?
{-3x + y = -2
y - 4 = -6x

a. consistent, independent
b. consistent, dependent
c. inconsistent
d. independent


Sagot :

[tex]-3x+y=-2 \\ y-4=-6x \ \ \ |\times (-1) \\ \\ -3x+y=-2 \\ \underline{-y+4=6x} \\ -3x+y-y+4=6x-2 \\ -3x+4=6x-2 \\ -3x-6x=-2-4 \\ -9x=-6 \\ x=\frac{-6}{-9} \\ x=\frac{2}{3} \\ \\ y-4=-6 \times \frac{2}{3} \\ y-4=-4 \\ y=-4+4 \\ y=0 \\ \\ (x,y)=(\frac{2}{3},0)[/tex]

The system has one solution so it's A. consistent and independent.