3+3x3-3+3

Sorry Bruce you need to follow order of operation rules

Brackets first   then

Indices (powers) next   then

Division and Multiplication   {left to right)   then

Additions and Subtraction (left to right)

 

BIDMAS

 

3+3x3-3+3

=3+  9  -3+3

=12-3+3

=12

3+3=6

6x3=18

18-3=15

15+3=18

so (18)

you all are wrong the answer is

x=y-3-x-y-z=2x=0