Question 326701
Algebraic solution is best, graphing can be dicey.
First one, substitute, it's ready to go. 
Substitute the second eq. into the first and solve for x.
{{{3(x-2) = x- 10}}}
{{{3x-6=x-10}}}
{{{2x=-4}}}
{{{x=-2}}}
Then use the second eq. to get y.
{{{y=-2-2}}}
{{{y=-4}}}
(-2,-4)
Since you get one unique solution the system is consistent and independent. 
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Second one. 
If you look at the second eq. it's the first eq. multiplied by 3. 
They're the same equation.
If you graphed them, they'd be the same line.
It is a dependent system. 
Every solution of the first equation is also a solution of the second equation so there are infinitely many solutions.