22. Subtract 3x - 4y + 7z from the sum of x-2y + 3z and - 4x +9y - 11z
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Step-by-step explanation:
The sum of x – 3y + 2z and -4x + 9y – 11z is
(x – 3y + 2z) + (-4x + 9y – 11z)
= x – 4x – 3y + 9y + 2z – 11z
= -3x + 6y – 9z
Now, Let us subtract the given expression from -3x + 6y – 9z
(-3x + 6y – 9z) – (3x – 4y – 7z)
= -3x – 3x + 6y + 4y – 9z + 7z
= -6x + 10y – 2x
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