15. Subtract the sum of 5x - 4y +62 and 8x + y - 22 from
49 + 6z and 8x + y - 22 from the sum of 12x - y + 3
-3x + 5y - 8z.
16. By how much is 2x - 3y + 4z greater than 2x + 5y - 6z+ 2?
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Answer:
15.(1)=49+6z-(5x-4y+62+8x+y-22)
=49+6z-(13x-3y+40)
=49+6z-13x+3y-40)
=-13x +6z+3y +9
(2)(12x-y+3-3x+5y-8z)-8x+y-22
=9x+4y-8z+3-8x+y-22
=5y+x-8z-19
16.2x-3y+4z -2x+5y-6z+2
=-2y-2z+2
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