Solve the following using Cramers Rule: w + x + y + z =, w + x + y + z =, w + x + y + z =, w + x + y + z = Practice Problem

a = b = c = d = e = <-- Equation 1
f = g = h = i = j = <-- Equation 2
k = l = m = n = o = <-- Equation 3
p = q = r = s = t = <-- Equation 4

The following four unknown practice equations have been generated for you:
9w + 20x + 13y - 4 = -2
14w + 4x - 5y + 16 = 6
17w + 19x + 13y + 20 = 12
11w + 19x + 13y + 7 = 13
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