Question

help me with this please ​

Answer 1

Answer:

9

Step-by-step explanation:

3{  (2x  - 2y) + (2y-2z) + (2z - 2x)  } + 9 = 3 * {0} + 9

                                                             = 9

[ 2x - 2x + 2y-2y + 2z-2z ] = 0

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