Question 1080826

{{{4x-4y=12 }}}....eq.1..both sides divide by {{{4}}}
{{{7x-7y=21}}}...both sides divide by {{{7}}}
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{{{x-y=3 }}}...eq.1
{{{x-y=3}}}..eq.2
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eq.1 is same as ..eq.2, so, the two lines are identical (one lies perfectly on top of the other) and intersect at all points of both lines and there are an {{{infinite}}} number of solutions and the system is {{{dependent}}}