If A=(1,2,4) and `vecA`+ `vecB`=(3,1,-2). What is B?

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The `vec A` = (1, 2, 4) and `vec A` + `vec B` = (3, 1, -2). Let `vec B` = (x, y, z)

As `vec A` = (1, 2, 4) and `vec A` + `vec B` = (3, 1, -2)

x + 1 = 3 => x = 2

y + 2 = 1 => y = -1

z + 4 = -2 => z = -6

The `vec B` = (2, -1, -6)

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