add the expressions 12x-7+3y+15+9z-8
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12x-7+3y+15+9z-8
12x+3y+9z-7-8+15
12x+3y+9z-15+15
answer=12x+3y+9z
as 15-15will cancel
12x+3y+9z-7-8+15
12x+3y+9z-15+15
answer=12x+3y+9z
as 15-15will cancel
Answered by
6
Here is your answer plz mark as brainliest.
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