Question

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¹) If A = x-2y+z, B = −2x+y+z and C= x+y-2z then find B-A + C.

Answer 1

=-2x + 4y + -2z

Explanation:

(-2x + y +z) - (x - 2y + z) + (x + y -2z)

Expand the brackets:
-2x + y +z - x + 2y -z + x + y - 2z

Simplify:

-2x + 4y + -2z