The equations of linear system are .
Here only two equations are used to find the two variables.
\The two equations are .
Since the coefficient of the x - term in the above two equations is same, eliminate these terms by subtracting the equations.
\Write the equations in column form and subtract to eliminate variable x.
\.
The resultant equation is and solve it for y.
Divide each side by 9.
\Cancel common terms.
\.
Substitute the value of in equation 2:
and solve for x.
Add 18 to each side.
\.
The solution is .