0
Anonymous
57 + z = 97
z = 97 - 57
z = 40
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It is a linear equation in the variable z.
(z=-3) and (z=7)
10
x + y + z = 0 x = a - b, y = b - c, z = c - a, therefore a - b + b - c + c - a = ? a - a + b - b + c - c = 0
z = 3.6