Question

From the sum of 2x + 3y - 5z, 4x – 2y + 7z,
subtract 5x – 9y – 2z​

Answer 1

Answer:

2x+3y-5z+(4x-2y+7z)-(5x-9y-2z)

2x+3y-5z+4x-2y+7z-(5x-9y-2z)

(2x+4x)+(3y-2y) +(-5z+7z)-(5x-9y-2z)

6x+y+2z-5x+9y+2z

(6x-5x) +(y+9y)+(2z+2z)

x+10y+4z

Answer 2

Answer:

2x + 3y - 5z + (4x - 2y + 7z)  - (5x - 9y - 2z)

so 2x + 3y - 5z + 4x - 2y + 7z because - and - is +

  factorize like terms

 2x + 4x + 3y -2y -5z + 7z

6x + 1y + 2z

now 6x + 1y + 2z - (5x - 9y - 2z)

6x + 1y + 2z - 5x + 9y + 2z

factorize like terms

6x - 5x + 1y + 9y + 2z + 2z

1x + 10y + 4z

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