Question 1078139
{{{(matrix(2,3,
14,-3,2,
2,18,74))}}}
Replace R2 with R1-7*R2,
{{{(matrix(2,3,
14,-3,2,
0,-129,-516))}}}
So then,
{{{-129y=-516}}}
Solve for y. Then use the either equation to solve for x.