Mathematics, 16.01.2022 18:00 jojoangelique13

If A=x-y+z ,B=2x - 3y-4z and C=4x-5y-6z then find A+B-C

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If A=x-y+z ,B=2x - 3y-4z and C=4x-5y-6z then find A+B-C...