Question 111383
adding the second equation to the first gives 3x-2y=3 (a)


adding the second equation to the third gives 5x-4y=5 (b)


multiplying equation (a) by -2 gives -6x+4y=-6
___ adding this to equation (b) gives -x=-1


plugging back into previous equations will give values for y and z



this is called the elimination method because you eliminate variables until you are left with only one