4. Subtract the sum of 13x - 11y + 9z and -7z + 3x - 5y from the sum of 6x - 7y - 5z,-4x + 6z- 9y and 5x - 4y + 3z.
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Answer:
-9x+4y+2z
Step-by-step explanation:
[(6x-7y-5z)+(-4x+6z-9y)+(5x-4y+3z)] -[(13x-11y+9z)+(-7z+3x-5y)]
=7x-12y+4z -( 16x-16y+2z)
=7x-12y+4z-16x+16y-2z
=-9x+4y+2z
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