Question 4239
Step 1:  Solve for one of the variables in one of the equations.


Step 2:  Substitute that quantity in place of that variable in the other equation.


Step 3:  Solve the resulting equation for the second variable.


Step 4:  Substitute the value of the second variable into the first equation.


Step 5:  Find the value of the second variable.


Step 6:  Substitute both values of the variables into both equations to check.


(Oops!!  That's six steps!!  Sorry about that.)  


R^2   SCC