The matrix below is in echelon form. x y zu 0 0 1 0 6 0 0 0 1 0 0 0 0 0 0 Write the corresponding linear system. equation 1 x + equation 2 equation 3 X + x + y + y + y+ Z+ Z+ Z+ U = U = U= Solve the linear system. (Enter your answers as a comma-separated list. If there are infinitel NONE.)

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Q: solve remaining parts

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Q: 2. Simplify: cos(+ x) cos(-x) = sin(n + x) sin(x + 37)

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