Question 665064
{{{4x + 8y = 16}}}
{{{-2x + 5y = 55}}} multiple this one by 2
{{{-4x + 10y + 110}}} now add this one to the first one

{{{4x + 8y = 16}}}
{{{-4x + 10y + 110}}}
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{{{18y = 126}}}
{{{y = 7}}}
use that solve for x
{{{4x + 8*7 = 16}}}
{{{4x + 56 = 16}}}
{{{4x = -40}}}
{{{x = -10}}}