A=3x+4y+z, B=3x-2y-z, C=x+y+z find A+B+C
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Answer:
7x + 3y + z
Step-by-step explanation:
A = 3x+4y+z. B = 3x-2y-z. C =x+y+z
A+B+C = 3x+4y+z+ 3x-2y-z + x+y+z
= 7x + 3y + z
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