Gaussian Jordan Method in solving in Solving System of Equations
(read the previous posts so you'll not be lost)

Tip:
dodge making the rows with fraction values
you can eliminate them by not just only multiplying a scalar.. you can add a multiple of other equation to another equatiion

Steps:
Put system of Equation to matrix form
You need to put the matrix to echelon form using row operations
you must leave each row only one variable ( diff variables each row)
after that put to system and write coordinate form of the solution

(1,4,-2)