Question 479811
{{{6x-4y=-8}}} ----->1
{{{11x+4y=76}}}----->2
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{{{17x   =68}}}
{{{x     =4}}}

substitute x=4 in equation (1)
{{{6x-4y=-8}}} 
{{{6(4)-4y=-8}}}
{{{24-4y=-8}}}
{{{-4y=-8-24}}}
{{{-4y=-32}}}
{{{y=8}}}

{{{x=4}}} and {{{y=8}}}