The equations of linear system are
.
Since the coefficient of the y - term in two equations is same. So, eliminate these terms by subtracting the equations.
\Write the equations in column form and subtract to eliminate variable y.
\
.
The resultant equation is
and solve it for x.
Divide each side by negative 7.
\
Cancel common terms.
\
.
Substitute the value of
in equation 1:
and solve for y.


Subtract 16 from each side.
\

Divide each side by 9.
\
Cancel common terms.
\
.
The solution is
.
The option C is correct answer.