<h2>Step 1: Solve one of the equations for one of the variables. Let's solve the first equation for y: ...</h2><h2>Step 2: Substitute that equation into the other equation, and solve for x. ...</h2><h2>Step 3: Substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.</h2>
