Replace x with 0 and solve the equation. Do that by eliminating one of the unknowns from two pairs of equations. 1 Solve the simultaneous equations.
For example let us eliminate z.
Maths revision video and notes on the topic of solving simulateneous equations including one linear and one quadratic or one linear and one circle. Maths revision video and notes on the topic of solving simulateneous equations including one linear and one quadratic or one linear and one circle. How to solve by elimination. Do that by eliminating one of the unknowns from two pairs of equations.