Solve the following system of linear equations by writing its corresponding RREF, and then write its solutions as a sum of a particular solution + linear combination of basic solutions. x₁ + x2 + x3 x4 3x1 +5x22x3 + x4 -3x₁ - 7x2 +7x35x4 x1 + 3x2 - 4x3 + 3x4 = 3 = 1 = 7 = -5.

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