Subtract the sum of 3x + 2y – 9z - 7, - 5x + 4y – 6z – 4 and
4x – y + 8z - 2 from the sum of 7x – 2y + 3z - 5 and 5x - 7y – z + 3
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Answer:
-15x - 14y + 5z - 15
Step-by-step explanation:
(3x + 2y - 9z - 7) + (-5x + 4y - 6z -4) + (4x - y + 8z -2)
= -2x + 5y + 7z - 13
(7x - 2y + 3z - 5) + (5x - 7y - z + 3)
= 13x - 9y + 2z - 2
(-2x + 5y + 7z - 13) - (13x - 9y + 2z - 2)
= -15x - 14y + 5z - 15
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