If A = 5x + 11y- 15z, B = 12x - 13y+19z,C =7x-6y+21zFind A-B-C
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Answer:
a-b-c=
5x+11y-15z-12x-13y+19z-7x-6y+21z
-14x -8y +24z
hope it helps.....
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