Answer:
x = 7
, y = -7
Step-by-step explanation:
Solve the following system:
{3 x - y = 28 | (equation 1)
3 x + y = 14 | (equation 2)
Subtract equation 1 from equation 2:
{3 x - y = 28 | (equation 1)
0 x+2 y = -14 | (equation 2)
Divide equation 2 by 2:
{3 x - y = 28 | (equation 1)
0 x+y = -7 | (equation 2)
Add equation 2 to equation 1:
{3 x+0 y = 21 | (equation 1)
0 x+y = -7 | (equation 2)
Divide equation 1 by 3:
{x+0 y = 7 | (equation 1)
0 x+y = -7 | (equation 2)
Collect results:
Answer: {x = 7
, y = -7
