Answer:
The answer is option C
y = 1/3x - 10 ........ 1
2x + y = 4 .......... 2
Substitute the first equation into the second one
That's
2x + 1/3x - 10 = 4
7/3x = 14
Multiply through by 3
That's
7x = 42
Divide both sides by 7
x = 6
Substitute x = 6 into any of the Equations
y = 1/3x - 10
y = 1/3(6) - 10
y = 2 - 10
y = - 8
Therefore
x = 6 y = - 8
Hope this helps
