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=8x-6y+10z+10x+12y-20z
=8x+10x-6y+12y+10z-20z
=18x+6y-10z
smoga membantu :)
8x-(-10x)=18x
-6y+12y=6y
10z-20z=-10z
jadi :18x+6y-10z
#semoga membantu ya