This worksheet is about finding solutions to more complex simultaneous equations.
Example:
x^{2} + y^{2} = 2 (eqn 1) x + y = 2 (eqn 2) 

From equation 2: y = 2  x, so y^{2} = (2  x)^{2} = 4  2x + x^{2} Substituting in equation 1 gives: x^{2} + 4  2x + x^{2} = 2
Normally, there are two pairs of solutions. 